diff --git a/lib/chrome.js b/lib/chrome.js
index 7e292d9..db6db60 100644
--- a/lib/chrome.js
+++ b/lib/chrome.js
@@ -28,7 +28,10 @@ var ChromeObject = function() {
         "port": 1080
     };
     this.inPrivate = false;
+
+	// user agent
     this.userAgent = null;
+	this.userAgents = [];
 
     // dependencies
     this.oAutoIt = null;
@@ -175,6 +178,11 @@ var ChromeObject = function() {
         return this;
     };
 
+	this.addUserAgent = function(ua) {
+		this.userAgents.push(ua);
+		return this;
+	};
+
     this.open = function(url) {
         this.setProfile(this.profileName, this.installedDir);
 
@@ -269,7 +277,12 @@ var ChromeObject = function() {
             // set user data directory
             cmd.push("--user-data-dir=\"" + this.userDataDir + "\"");
 
-            // set user agent
+            // choice user agent
+			if (this.userAgents.length > 0) {
+				this.setUserAgent(RAND.one(this.userAgents));
+			}
+
+			// set user agent
             if (this.userAgent != null) {
                 cmd.push("--user-agent=\"" + this.userAgent + "\"");
             }