Never lose your Keys, Wallet or mobile phone again with the Bluetooth Smart Tag! Simply attach the tag to any item using either of its ears and use the app to locate it in seconds! You can either set off an alarm on the tracker or activate GPS on your app to show the location of the missing item. Features an out of range alarm on your device to alert you your item has been left behind or dropped. Also features a simple selfie device. We have been so impressed with the performance of this product and the great array of features for such a reasonable price.Great Brand reinforcement as the Bluetooth Smart Tag can be printed in full colour. Suitable for both Android and IPhone devices. Supplied with one CR2032 Coin Cell Battery.