If you’ve been using Google’s Android Device Manager to locate missing smartphones and tablets, you can now get some help with your Android smartwatch. Google has added support for Android Wear to help you find your wayward Android device. All you need to do is say, “Ok, Google. Start. Find my phone.” Or you can look for the “Find my phone” feature in the Start menu. This will have your Android device ringing at full volume and will hopefully have you reunited with it in no time. The update will be rolling out to Android Wear devices in the coming weeks.
Source: Official Android Blog