diff --git a/src/ua.js b/src/ua.js
index d89106e..1153c1b 100644
--- a/src/ua.js
+++ b/src/ua.js
@@ -15,7 +15,7 @@ void function (window, _ext) {
 	// detect by ua string
 	ua.str = navigator.userAgent
 
-	function __detect(ua) {
+	function _detect(ua) {
 		var s = ua.str.toLowerCase()
 
 		ua.isSafari = /\bapple\b/i.test(navigator.vendor) && /\bsafari\b/i.test(s)
@@ -50,6 +50,67 @@ void function (window, _ext) {
 		// summery
 		if (ua.isIOS || ua.isAndroid) ua.isMobileDevice = true
 
+		// get browser info
+		var browser = ''
+		if (_.str.include(s, 'micromessenger')) {
+			browser = 'wechat'
+		} else if (_.str.include(s, 'ucbrowser') || _.str.include(s, 'ucweb') || _.str.include(s, ' uc applewebkit')) {
+			browser = 'uc'
+		} else if (_.str.include(s, 'baiduhd') || _.str.include(s, 'baiduboxapp')) {
+			browser = 'baidu-app'
+		} else if (_.str.include(s, 'baidubrowser')) {
+			browser = 'baidu-browser'
+		} else if (_.str.include(s, 'mqqbrowser')) {
+			browser = 'mqq'
+		} else if (_.str.include(s, 'miuibrowser')) {
+			browser = 'miui'
+		} else if (_.str.include(s, '_weibo_') || _.str.include(s, ' weibo ')) {
+			browser = 'weibo'
+		} else if (_.str.include(s, 'firefox')) {
+			browser = 'firefox'
+		} else if (_.str.include(s, 'opera')) {
+			browser = 'opera'
+		} else if (ua.isChrome) {
+			browser = 'chrome'
+			if (ua.isAndroid && /\bwv\b/.test(s)) browser = 'chrome-webview'
+		} else if (ua.isSafari) {
+			browser = 'safari'
+		}
+
+		// fix - some browsers might be detected as Chrome or Safari
+		if (browser !== 'chrome') ua.isChrome = false
+		if (browser !== 'safari') ua.isSafari = false
+
+		// get engine info
+		var engine = ''
+		var engineVersion = ''
+		var testChrome = /chrome[^\d]*([\.\d]*)[ ;\/]/.exec(s)
+		if (testChrome) {
+			engine = 'chrome'
+			engineVersion = _trimVersion(testChrome[1])
+		} else {
+			var testWebKit = /webkit[^\d]*([\.\d]*)\+*[ ;\/]/.exec(s)
+			if (testWebKit) {
+				engine = 'webkit'
+				engineVersion = _trimVersion(testWebKit[1])
+			}
+		}
+		if (!engine) {
+			if (_.str.include(s, 'webkit')) {
+				engine = 'webkit'
+			} else if (ua.isIOS) {
+				engine = 'webkit'
+			} else if (ua.isAndroid && browser === 'mqq') {
+				engine = 'webkit'
+			}
+			if (browser === 'firefox' && !ua.isIOS) engine = 'gecko'
+			if (browser === 'opera' && !ua.isIOS && _.str.include(s, 'presto')) engine = 'presto'
+		}
+
+		// output
+		ua.browser = browser
+		ua.engine = engine
+		ua.engineVersion = engineVersion
 		return ua
 	}
 
@@ -60,12 +121,21 @@ void function (window, _ext) {
 	}
 	*/
 
+	// util
+	// TODO: implement a stricter API: `_.str.formatVersion(ver, length)`, e.g. ('1.2', 3) -> '1.2.0'
+	function _trimVersion(ver, length) {
+		var temp = ver.split('.')
+		temp.length = length || 2
+		return _.compact(temp).join('.')
+	}
+
 	// init
-	__detect(ua)
+	_detect(ua)
 
 	/** DEBUG_INFO_START **/
 	// exports for unit test
-	ua.__detect = __detect
+	ua.__detect = _detect
+	ua.__trimVersion = _trimVersion
 	/** DEBUG_INFO_END **/
 
 	// exports
diff --git a/test/test-ua.js b/test/test-ua.js
index 5a93c51..1ce2e12 100644
--- a/test/test-ua.js
+++ b/test/test-ua.js
@@ -1,4 +1,47 @@
 describe('UA', function () {
+
+	var _detect = _.ua.__detect
+	var _trimVersion = _.ua.__trimVersion
+
+	describe('Util', function () {
+		if (!_trimVersion) {
+			it('(Skipped)', function () {})
+			return
+		}
+		describe('_trimVersion()', function () {
+			it('does basic functionality', function () {
+				var ver
+				ver = '1.2.3'
+				expect(_trimVersion(ver, 1)).to.equal('1')
+				expect(_trimVersion(ver, 2)).to.equal('1.2')
+				expect(_trimVersion(ver, 3)).to.equal('1.2.3')
+				ver = 'x.y.z'
+				expect(_trimVersion(ver, 1)).to.equal('x')
+				expect(_trimVersion(ver, 2)).to.equal('x.y')
+				expect(_trimVersion(ver, 3)).to.equal('x.y.z')
+				ver = '0.0'
+				expect(_trimVersion(ver, 1)).to.equal('0')
+				expect(_trimVersion(ver, 2)).to.equal('0.0')
+				expect(_trimVersion(ver, 3)).to.equal('0.0')
+				ver = '0'
+				expect(_trimVersion(ver, 1)).to.equal('0')
+				expect(_trimVersion(ver, 2)).to.equal('0')
+				expect(_trimVersion(ver, 3)).to.equal('0')
+			})
+			it('trim version string to 2 segments by default', function () {
+				var ver
+				ver = '1.2.3'
+				expect(_trimVersion(ver)).to.equal(_trimVersion(ver, 2))
+				ver = 'x.y.z'
+				expect(_trimVersion(ver)).to.equal(_trimVersion(ver, 2))
+				ver = '0.0'
+				expect(_trimVersion(ver)).to.equal(_trimVersion(ver, 2))
+				ver = '0'
+				expect(_trimVersion(ver)).to.equal(_trimVersion(ver, 2))
+			})
+		})
+	})
+
 	describe('Detect Feature', function () {
 		describe('_.ua.isTouchDevice', function () {
 			it('means element has `touch-` event', function () {
@@ -14,244 +57,329 @@ describe('UA', function () {
 	})
 
 	describe('Detect UA String', function () {
-		if (!_.ua.__detect) {
+		if (!_detect) {
 			it('(Skipped)', function () {})
-		} else {
-			describe('_detect()', function () {
-				// fn
-				var _detect = _.ua.__detect
+			return
+		}
+		// ios safari
+		var iphone_ios_40 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.05 Mobile/8A293 Safari/6531.22.7'}
+		var ipod_ios_30 = {str: 'Mozilla/5.0 (iPod; U; CPU iPhone OS 3_0 like Mac OS X; zh-cn) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16'}
+		var ipad_ios_322 = {str: 'Mozilla/5.0 (iPad; U; CPU OS_3_2_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B500 Safari/531.21.10'}
+		var iphone_ios_60 = {str: 'Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25'}
+		var iphone_ios_00 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS x_x_x like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.05 Mobile/8A293 Safari/6531.22.7'}
+		var ipod_ios_99900 = {str: 'Mozilla/5.0 (iPod; U; CPU iPhone OS_999 like Mac OS X; zh-cn) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16'}
+		var ipad_ios_00 = {str: 'Mozilla/5.0 (iPad; U; CPU OS ?_?_? like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B500 Safari/531.21.10'}
+		// ios uc
+		var uc_ios_421 = {str: 'IUC(U;iOS 4.2.1;Zh-cn;320*480;)/UCWEB8.1.2.111/41/800'}
+		var uc_ios_501 = {str: 'IUC(U;iOS 5.0.1;Zh-cn;320*480;)/UCWEB8.4.1.169/42/997'}
+		// ios qq
+		var qq_ios_511 = {str: 'MQQBrowser/34 Mozilla/5.0 (iPhone 4; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Safari/7534.48.3'}
+		// ios chrome
+		var gc_ios_511 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS 7_0_1 like Mac OS X; zh-cn) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3'}
 
-				// ios safari
-				var iphone_ios_40 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.05 Mobile/8A293 Safari/6531.22.7'}
-				var ipod_ios_30 = {str: 'Mozilla/5.0 (iPod; U; CPU iPhone OS 3_0 like Mac OS X; zh-cn) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16'}
-				var ipad_ios_322 = {str: 'Mozilla/5.0 (iPad; U; CPU OS_3_2_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B500 Safari/531.21.10'}
-				var iphone_ios_60 = {str: 'Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25'}
-				var iphone_ios_00 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS x_x_x like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.05 Mobile/8A293 Safari/6531.22.7'}
-				var ipod_ios_99900 = {str: 'Mozilla/5.0 (iPod; U; CPU iPhone OS_999 like Mac OS X; zh-cn) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16'}
-				var ipad_ios_00 = {str: 'Mozilla/5.0 (iPad; U; CPU OS ?_?_? like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B500 Safari/531.21.10'}
-				// ios uc
-				var uc_ios_421 = {str: 'IUC(U;iOS 4.2.1;Zh-cn;320*480;)/UCWEB8.1.2.111/41/800'}
-				var uc_ios_501 = {str: 'IUC(U;iOS 5.0.1;Zh-cn;320*480;)/UCWEB8.4.1.169/42/997'}
-				// ios qq
-				var qq_ios_511 = {str: 'MQQBrowser/34 Mozilla/5.0 (iPhone 4; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9B206 Safari/7534.48.3'}
-				// ios chrome
-				var gc_ios_511 = {str: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS 7_0_1 like Mac OS X; zh-cn) AppleWebKit/534.46.0 (KHTML, like Gecko) CriOS/19.0.1084.60 Mobile/9B206 Safari/7534.48.3'}
+		describe('iOS Safari', function () {
+			it('recognizes iphone_ios_40', function () {
+				var ua = _detect(iphone_ios_40)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.true
+				expect(!!ua.isIPod).to.be.false
+				expect(!!ua.isIPad).to.be.false
+				expect(ua.osVersion).to.equal('4.0')
+				//expect(ua.browser).to.equal('safari')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('532.9')
+			})
+			it('recognizes ipod_ios_30', function () {
+				var ua = _detect(ipod_ios_30)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.false
+				expect(!!ua.isIPod).to.be.true
+				expect(!!ua.isIPad).to.be.false
+				expect(ua.osVersion).to.equal('3.0')
+				//expect(ua.browser).to.equal('safari')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('528.18')
+			})
+			it('recognizes ipad_ios_322', function () {
+				var ua = _detect(ipad_ios_322)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.false
+				expect(!!ua.isIPod).to.be.false
+				expect(!!ua.isIPad).to.be.true
+				expect(ua.osVersion).to.equal('3.2')
+				//expect(ua.browser).to.equal('safari')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('531.21')
+			})
+			it('recognizes iphone_ios_60', function () {
+				var ua = _detect(iphone_ios_60)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.true
+				expect(!!ua.isIPod).to.be.false
+				expect(!!ua.isIPad).to.be.false
+				expect(ua.osVersion).to.equal('6.0')
+				//expect(ua.browser).to.equal('safari')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('536.26')
+			})
+			it('recognizes iphone_ios_00', function () {
+				var ua = _detect(iphone_ios_00)
+				expect(ua.osVersion).to.equal('0.0')
+			})
+			it('recognizes ipod_ios_99900', function () {
+				var ua = _detect(ipod_ios_99900)
+				expect(ua.osVersion).to.equal('999.0')
+			})
+			it('recognizes ipad_ios_00', function () {
+				var ua = _detect(ipad_ios_00)
+				expect(ua.osVersion).to.equal('0.0')
+			})
+		})
+		describe('iOS Third-Party Browser', function () {
+			it('recognizes uc_ios_421', function () {
+				var ua = _detect(uc_ios_421)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(ua.osVersion).to.equal('4.2')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('')
+			})
+			it('recognizes uc_ios_501', function () {
+				var ua = _detect(uc_ios_501)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(ua.osVersion).to.equal('5.0')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('')
+			})
+			it('recognizes qq_ios_511', function () {
+				var ua = _detect(qq_ios_511)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.true
+				expect(!!ua.isIPod).to.be.false
+				expect(!!ua.isIPad).to.be.false
+				expect(ua.osVersion).to.equal('5.1')
+				expect(ua.browser).to.equal('mqq')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('534.46')
+			})
+			it('recognizes gc_ios_511', function () {
+				var ua = _detect(gc_ios_511)
+				expect(!!ua.isChrome).to.be.true
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.true
+				expect(!!ua.isAndroid).to.be.false
+				expect(!!ua.isIPhone).to.be.true
+				expect(!!ua.isIPod).to.be.false
+				expect(!!ua.isIPad).to.be.false
+				expect(ua.osVersion).to.equal('7.0')
+				expect(ua.browser).to.equal('chrome')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('534.46')
+			})
+		})
 
-				describe('iOS Safari', function () {
-					it('recognizes typical devices - iphone_ios_40', function () {
-						var ua = _detect(iphone_ios_40)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.true
-						expect(!!ua.isIPod).to.be.false
-						expect(!!ua.isIPad).to.be.false
-						expect(ua.osVersion).to.equal('4.0')
-					})
-					it('recognizes typical devices - ipod_ios_30', function () {
-						var ua = _detect(ipod_ios_30)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.false
-						expect(!!ua.isIPod).to.be.true
-						expect(!!ua.isIPad).to.be.false
-						expect(ua.osVersion).to.equal('3.0')
-					})
-					it('recognizes typical devices - ipad_ios_322', function () {
-						var ua = _detect(ipad_ios_322)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.false
-						expect(!!ua.isIPod).to.be.false
-						expect(!!ua.isIPad).to.be.true
-						expect(ua.osVersion).to.equal('3.2')
-					})
-					it('recognizes typical devices - iphone_ios_60', function () {
-						var ua = _detect(iphone_ios_60)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.true
-						expect(!!ua.isIPod).to.be.false
-						expect(!!ua.isIPad).to.be.false
-						expect(ua.osVersion).to.equal('6.0')
-					})
-					it('recognizes typical devices - iphone_ios_00', function () {
-						var ua = _detect(iphone_ios_00)
-						expect(ua.osVersion).to.equal('0.0')
-					})
-					it('recognizes typical devices - ipod_ios_99900', function () {
-						var ua = _detect(ipod_ios_99900)
-						expect(ua.osVersion).to.equal('999.0')
-					})
-					it('recognizes typical devices - ipad_ios_00', function () {
-						var ua = _detect(ipad_ios_00)
-						expect(ua.osVersion).to.equal('0.0')
-					})
-				})
-				describe('iOS Third-Party Browser', function () {
-					it('recognizes typical devices - uc_ios_421', function () {
-						var ua = _detect(uc_ios_421)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(ua.osVersion).to.equal('4.2')
-					})
-					it('recognizes typical devices - uc_ios_501', function () {
-						var ua = _detect(uc_ios_501)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(ua.osVersion).to.equal('5.0')
-					})
-					it('recognizes typical devices - qq_ios_511', function () {
-						var ua = _detect(qq_ios_511)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.true
-						expect(!!ua.isIPod).to.be.false
-						expect(!!ua.isIPad).to.be.false
-						expect(ua.osVersion).to.equal('5.1')
-					})
-					it('recognizes typical devices - gc_ios_511', function () {
-						var ua = _detect(gc_ios_511)
-						expect(!!ua.isChrome).to.be.true
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.true
-						expect(!!ua.isAndroid).to.be.false
-						expect(!!ua.isIPhone).to.be.true
-						expect(!!ua.isIPod).to.be.false
-						expect(!!ua.isIPad).to.be.false
-						expect(ua.osVersion).to.equal('7.0')
-					})
-				})
+		// android
+		var adr_21 = {str: 'Mozilla/5.0 (Linux; U; Android 2.1-update1; zh-cn; SCH-i909 Build/ECLAIR) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17'}
+		var adr_22 = {str: 'Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'}
+		var adr_234 = {str: 'Mozilla/5.0 (Linux; U; Android 2.3.4; fr-fr; Nexus S Build/GRJ22) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'}
+		var adr_403 = {str: 'sprd-SunupG20/1.0 Linux/2.6.35.7 Android/Android4.0.3 Release/08.16.2012 Browser/AppleWebKit533.1 (KHTML, like Gecko) Mozilla/5.0 Mobile'}
+		// android gc
+		var gc_adr_404 = {str: 'Mozilla/5.0 (Linux; Android 4.0.4; Galaxy Nexus Build/IMM76B) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.133 Mobile Safari/535.19'}
+		// android uc
+		var uc_adr_233 = {str: 'ucweb/2.0 (linux; u; adr 2.3.3; zh-cn; htc incredible s) u2/1.0.0 ucbrowser/9.0.1.294 u2/1.0.0 mobile'}
+		var uc_adr_234 = {str: 'juc(linux;u;2.3.4;zh_cn;adr6400l;480*800;)ucweb7.8.1.96/139/800'}
+		var uc_adr_404 = {str: 'juc (linux; u; 4.0.4; zh-cn; adr6400l; 480*800) ucweb7.9.1.100/139/800'}
+		var uc_adr_00 = {str: 'Mozilla/5.0 (Linux; U; Android VillainROM7.0.0; zh-cn; HTC Hero Build/ERE27) UC AppleWebKit/530+ (KHTML, like Gecko) Mobile Safari/530'}
+		// android qq
+		var qq_adr_422 = {str: 'mqqbrowser/3.6/adr (linux; u; 4.2.2; zh-cn; t9508 build/t9508_v2.00;480*854)'}
+		// android firefox
+		var ff_adr_00 = {str: 'Mozilla/5.0 (Android; Linux armv7l; rv:10.0.2) Gecko/20120215 Firefox/10.0.2 Fennec/10.0.2'}
+		// android opera
+		var op_adr_404 = {str: 'opera/9.80 (android 4.0.4; linux; opera mobi/oupenghd-1.6/adr-1301101034) presto/2.11.355 version/12.10'}
+		// android other
+		var xx_adr_235 = {str: 'coolpad8070_cmcc_td/1.08 linux/2.6.35 android/2.3.5 release/03.29.2012 mozilla/5.0 applewebkit/533.1 version/4.0 mobile safari/533.1 parameters/{scr=533_320,cm=1,ql=l} tiantian(securitypay) tiantian(tenpay)'}
+		var xx_adr_22 = {str: 'coship_coship t71_td/1.0 android_os/2.2 marvell_pxa918/beta10 release/7.11.2011 browser/skybrowser1.0.6 profile/midp-2.0 configuration/cldc-1.1 parameters/{scr=480_320,cm=1,ql=l} tiantian(securitypay)'}
 
-				// android
-				var adr_21 = {str: 'Mozilla/5.0 (Linux; U; Android 2.1-update1; zh-cn; SCH-i909 Build/ECLAIR) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17'}
-				var adr_22 = {str: 'Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'}
-				var adr_234 = {str: 'Mozilla/5.0 (Linux; U; Android 2.3.4; fr-fr; Nexus S Build/GRJ22) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1'}
-				var adr_403 = {str: 'sprd-SunupG20/1.0 Linux/2.6.35.7 Android/Android4.0.3 Release/08.16.2012 Browser/AppleWebKit533.1 (KHTML, like Gecko) Mozilla/5.0 Mobile'}
-				// android uc
-				var uc_adr_233 = {str: 'ucweb/2.0 (linux; u; adr 2.3.3; zh-cn; htc incredible s) u2/1.0.0 ucbrowser/9.0.1.294 u2/1.0.0 mobile'}
-				var uc_adr_234 = {str: 'juc(linux;u;2.3.4;zh_cn;adr6400l;480*800;)ucweb7.8.1.96/139/800'}
-				var uc_adr_404 = {str: 'juc (linux; u; 4.0.4; zh-cn; adr6400l; 480*800) ucweb7.9.1.100/139/800'}
-				var uc_adr_00 = {str: 'Mozilla/5.0 (Linux; U; Android VillainROM7.0.0; zh-cn; HTC Hero Build/ERE27) UC AppleWebKit/530+ (KHTML, like Gecko) Mobile Safari/530'}
-				// android qq
-				var qq_adr_422 = {str: 'mqqbrowser/3.6/adr (linux; u; 4.2.2; zh-cn; t9508 build/t9508_v2.00;480*854)'}
-				// android firefox
-				var ff_adr_00 = {str: 'Mozilla/5.0 (Android; Linux armv7l; rv:10.0.2) Gecko/20120215 Firefox/10.0.2 Fennec/10.0.2'}
-				// android opera
-				var op_adr_404 = {str: 'opera/9.80 (android 4.0.4; linux; opera mobi/oupenghd-1.6/adr-1301101034) presto/2.11.355 version/12.10'}
-				// android other
-				var xx_adr_235 = {str: 'coolpad8070_cmcc_td/1.08 linux/2.6.35 android/2.3.5 release/03.29.2012 mozilla/5.0 applewebkit/533.1 version/4.0 mobile safari/533.1 parameters/{scr=533_320,cm=1,ql=l} tiantian(securitypay) tiantian(tenpay)'}
-				var xx_adr_22 = {str: 'coship_coship t71_td/1.0 android_os/2.2 marvell_pxa918/beta10 release/7.11.2011 browser/skybrowser1.0.6 profile/midp-2.0 configuration/cldc-1.1 parameters/{scr=480_320,cm=1,ql=l} tiantian(securitypay)'}
+		describe('Android Browser', function () {
+			it('recognizes adr_21', function () {
+				var ua = _detect(adr_21)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.1')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('530.17')
+			})
+			it('recognizes adr_22', function () {
+				var ua = _detect(adr_22)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.2')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('533.1')
+			})
+			it('recognizes adr_234', function () {
+				var ua = _detect(adr_234)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.3')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('533.1')
+			})
+			it('recognizes adr_403', function () {
+				var ua = _detect(adr_403)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('4.0')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('533.1')
+			})
 
-				describe('Android Browser', function () {
-					it('recognizes typical devices - adr_21', function () {
-						var ua = _detect(adr_21)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.1')
-					})
-					it('recognizes typical devices - adr_22', function () {
-						var ua = _detect(adr_22)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.2')
-					})
-					it('recognizes typical devices - adr_234', function () {
-						var ua = _detect(adr_234)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.3')
-					})
-					it('recognizes typical devices - adr_403', function () {
-						var ua = _detect(adr_403)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('4.0')
-					})
-				})
-				describe('Android Third-Party Browser', function () {
-					it('recognizes typical devices - uc_adr_233', function () {
-						var ua = _detect(uc_adr_233)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.3')
-					})
-					it('recognizes typical devices - uc_adr_234', function () {
-						var ua = _detect(uc_adr_234)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.3')
-					})
-					it('recognizes typical devices - uc_adr_404', function () {
-						var ua = _detect(uc_adr_404)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('4.0')
-					})
-					it('recognizes typical devices - uc_adr_00', function () {
-						var ua = _detect(uc_adr_00)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('0.0')
-					})
+			it('recognizes gc_adr_404', function () {
+				var ua = _detect(gc_adr_404)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('4.0')
+				expect(ua.browser).to.equal('chrome')
+				expect(ua.engine).to.equal('chrome')
+				expect(ua.engineVersion).to.equal('18.0')
+			})
+		})
 
-					it('recognizes typical devices - qq_adr_422', function () {
-						var ua = _detect(qq_adr_422)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('4.2')
-					})
+		describe('Android Third-Party Browser', function () {
+			it('recognizes uc_adr_233', function () {
+				var ua = _detect(uc_adr_233)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.3')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('')
+				expect(ua.engineVersion).to.equal('')
+			})
+			it('recognizes uc_adr_234', function () {
+				var ua = _detect(uc_adr_234)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.3')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('')
+				expect(ua.engineVersion).to.equal('')
+			})
+			it('recognizes uc_adr_404', function () {
+				var ua = _detect(uc_adr_404)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('4.0')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('')
+				expect(ua.engineVersion).to.equal('')
+			})
+			it('recognizes uc_adr_00', function () {
+				var ua = _detect(uc_adr_00)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('0.0')
+				expect(ua.browser).to.equal('uc')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('530')
+			})
 
-					it('recognizes typical devices - ff_adr_00', function () {
-						var ua = _detect(ff_adr_00)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('0.0')
-					})
+			it('recognizes qq_adr_422', function () {
+				var ua = _detect(qq_adr_422)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('4.2')
+				expect(ua.browser).to.equal('mqq')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('')
+			})
 
-					it('recognizes typical devices - op_adr_404', function () {
-						var ua = _detect(op_adr_404)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('4.0')
-					})
+			it('recognizes ff_adr_00', function () {
+				var ua = _detect(ff_adr_00)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('0.0')
+				expect(ua.browser).to.equal('firefox')
+				expect(ua.engine).to.equal('gecko')
+				expect(ua.engineVersion).to.equal('')
+			})
 
-					it('recognizes typical devices - xx_adr_235', function () {
-						var ua = _detect(xx_adr_235)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.3')
-					})
+			it('recognizes op_adr_404', function () {
+				var ua = _detect(op_adr_404)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('4.0')
+				expect(ua.browser).to.equal('opera')
+				expect(ua.engine).to.equal('presto')
+				expect(ua.engineVersion).to.equal('')
+			})
 
-					it('recognizes typical devices - xx_adr_22', function () {
-						var ua = _detect(xx_adr_22)
-						expect(!!ua.isMobileDevice).to.be.true
-						expect(!!ua.isIOS).to.be.false
-						expect(!!ua.isAndroid).to.be.true
-						expect(ua.osVersion).to.equal('2.2')
-					})
-				})
+			it('recognizes xx_adr_235', function () {
+				var ua = _detect(xx_adr_235)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.3')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('webkit')
+				expect(ua.engineVersion).to.equal('533.1')
 			})
-		}
-	})
+			it('recognizes xx_adr_22', function () {
+				var ua = _detect(xx_adr_22)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('2.2')
+				expect(ua.browser).to.equal('')
+				expect(ua.engine).to.equal('')
+				expect(ua.engineVersion).to.equal('')
+			})
+		})
 
+		// webview
+		var wv_adr_511 = {str: 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 5 Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.65 Mobile Safari/537.36'}
+		describe('Android Chrome WebView', function () {
+			it('recognizes wv_adr_511', function () {
+				var ua = _detect(wv_adr_511)
+				expect(!!ua.isMobileDevice).to.be.true
+				expect(!!ua.isIOS).to.be.false
+				expect(!!ua.isAndroid).to.be.true
+				expect(ua.osVersion).to.equal('5.1')
+				expect(ua.browser).to.equal('chrome-webview')
+				expect(ua.engine).to.equal('chrome')
+				expect(ua.engineVersion).to.equal('43.0')
+			})
+		})
+	})
 })