Bluetooth anti-loss/ finder device made in durable ABS material. It works with a free app available in both iOS and Android. Attach the device to your bag, keys or luggage and whenever your belongings are lost the device will help you to find them. The additional features available with this item areremote shutter/selfie button and phone finder function. 1 CR2032 battery included. Range distance:15m inside/ 25m outside