Specification: Item Type: Bluetooth Tracking Device_x000D_Bluetooth Version: 4.0_x000D_Working Distance: 10 Meters_x000D_Battery: CR2032 240mAh x 1 (Delivered with Battery)_x000D_Support for iOS/Android Systems: For iOS System Requires Version 7 or Higher; For Android System Requires Version 4.4 or Higher Features: 1The Bluetooth anti?lost device is a great convenience for you to search or locate lost items and can easily find your belongings such as wallets, keys,pets, etc. 2Connect this device to the items you often misplace, use the Bluetooth anti?lost device to save your time searching for things, and keep your life in order. 3When the Bluetooth anti?lost device is disconnected from the mobile phone, the mobile phone application and the Bluetooth anti?lost device will sound an alarm to remind you at the same time. 4Convenient for you to check the last position of the object on your mobile phone to help you find it. So you can open the map in the app and predict the approximate location of the lost item. 5Low?power Bluetooth technology, extremely low power consumption, standby for more than 6 months, and convenient battery replacement. A mobile phone can manage up to 7 anti?lost devices at the same time. PackageList: 1 xBluetoothTrackingDevice 1 x Instruction