Attaching your keychain, wallet, bag, pet or bike by using Bluetooth Selfie Finder with a free smart phone iTracking app download, you can track your item anywhere. Using the app, this item tracker will ring and directions will display on your phone. And you can Selfie though Bluetooth connecting with the smartphone. Compatible with and Android with Bluetooth4. 0. Available in range of 25 meters. (IOS5. 0 and Andriod 4. 3 version and up-grade version)