Item Type: Bluetooth Tracking DeviceBluetooth Version: 4.0Working Distance: 10 MetersBattery: CR2032 240mAh x 1 (Delivered with Battery)Support for iOS/Android Systems: For iOS System Requires Version 7 or Higher; For Android System Requires Version 4.4 or Higher Package List1 x Bluetooth Tracking Device1 x Instruction1The Bluetooth antilost 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 antilost device to save your time searching for things, and keep your life in order. 3When the Bluetooth antilost device is disconnected from the mobile phone, the mobile phone application and the Bluetooth antilost 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. 5Lowpower Bluetooth technology, extremely low power consumption, standby for more than 6 months, and convenient battery replacement. A mobile phone can manage up to 7 antilost devices at the same time.