Welcome to our store! This Bluetooth anti-loss device is a great convenience for searching for or locating lost items and can easily find your belongings such as wallets, keys, pets, etc. Attach this device to items you frequently misplace and use the Bluetooth anti-loss device to save time searching and keep your life organized. When the Bluetooth anti-loss device is disconnected from the mobile phone, both the mobile phone application and the Bluetooth anti-loss device will sound an alarm to remind you. Conveniently check the item's last known location on your mobile phone to help you find it. You can open the map in the app and predict the approximate location of the lost item. Features power Bluetooth technology, extremely low power consumption, standby for more than 6 months, and convenient battery replacement. One mobile phone can manage up to 7 anti-loss devices simultaneously. Item Type: Bluetooth Tracking Device Bluetooth Version: 4.0 Working Distance: 10 meters Battery: CR2032 240mAh x 1 (comes with battery) iOS/Android System Support: For iOS System requires version 7 or higher; For Android System requires version 4.4 or higher 1 x Bluetooth Tracking Device 1 x Instruction Satisfaction Guaranteed: Customers are our top priority. If you find any problem with the product, please contact the seller immediately. We strive to provide satisfactory after-sales service.