Locate and ring your misplaced device
If you ended up dropping your phone between those couch cushions, Android Device Manager lets you quickly ring your phone at maximum volume so you can find it, even if it's been silenced. And in the event that your phone or tablet is out of earshot (say, at that restaurant you left it at last night), you can locate it on a map in real time.
Protecting your personal information and data
While losing your phone can be stressful, Android Device Manager can help you keep your data from ending up in the wrong hands. If your phone can’t be recovered, or has been stolen, you can quickly and securely erase all of the data on your device.
Availability and getting started
This service is now available on devices running Android 2.2 or above; to use it, you also will need to be signed into your Google Account. There will also be an Android app to allow you to easily find and manage your devices. To activate Android device Manager simply go to menu>settings>security>device administrators> and check the box behind Android Device Manager to activate.
Google has also announced as of today the availability of Android Device Manager website you can access it at www.android.com/devicemanager.