This Bluetooth tracking device is great for keeping track of things like your wallet, handbag, car keys, house keys & more It works with an app that is downloaded onto your phone.  When in Bluetooth range (10m), you can activate a beeping sound on the tracking device to locate it. If the device is out of range (for example you have left your wallet, with a tracking device fitted) at the shops, you can open the app and see on a google maps type map where the tracking device was last connected to your phone. Quick & easy to setup  Can connect up to 4 tracking devices per mobile phone  Each tag can be named (eg. wallet / car keys / glasses etc.) Works with iOS and Android devices  battery life of 180 days  Powered by 1 x CR2032 battery (tracking device is supplied with a battery installed) comes with a key chain holder Comes with an easy to use instruction manual Note: This product works with Bluetooth only & is not a gps tracking device.