Item Type: Anti Lost Alarm SensorMaterial: ABSBluetooth: 4.0Working Distance: Approx. 25m / 82ft ( Outdoor Environment)Battery: CR2032 220mAh X 1 ( Shipped with Battery)Compatible: For iOS 4S /5 / 5S / 5C, for iPad mini, for iTouch5, for iPad 3 / 4, for Android, for Bluetooth 4.0 Smartphone (for Android 4.3 and Upgraded Version)Package List1 x Anti Lost Alarm Sensor1 x Manual1With function of controlling the selfie of phone, can realize the remote control of taking pictures. 2Bluetooth antilost device is a great convenience for searching or locating lost items, easily find your belongings. 3The location function is convenient for you to view the last position of the object on your phone to help you find it. 4Using lowpower wireless technology, it can stand by for many months, and the battery is easy to replace. 5The device can be monitored through a mobile phone to help you effectively manage multiple items.