XY3 3rd Gen Item Finder - Bluetooth Key Finder, Wallet Tracker, Phone Finder Lost Item Tracker iOS Android (Ruby) FIND YOUR THINGS: Use your phone to find your things by making the XY3 beep, following the signal strength indicator, and even by seeing your lost items on a map! FIND YOUR PHONE: Press the button to make your nearby lost phone ring, or log in to the website to see its location on a map. STOP LEAVING THINGS BEHIND: Our exclusive KeepNear notifications let you know when your XY3 is out of range. COMMUNITY LOST AND FOUND: Can't find something? Mark it as "lost" in the app and enlist the help of our global lost and found community. You'll get a private notification when it's within range of anyone using the app. REPLACEABLE BATTERY: The XY3 uses a standard, easily replaceable CR2032 battery.