1The Bluetooth antilost device is a great convenience for searching or locating lost items. Connect it to the items you often misplace, use the Bluetooth antilost device to save your time searching for things, and keep your life in order. 2When the Bluetooth antilost device is disconnected from the mobile phone, the mobile phone application will remind you, and the Bluetooth antilost device will also sound an alarm to remind you. As long as the product is out of range, your mobile phone and the Bluetooth antilost device will beep to remind you. 3With a phone number sticker, you can paste your number on the Bluetooth antilost device, so that goodhearted people who have found your lost items can contact you through the mobile phone number affixed on the Bluetooth antilost device. 4The location function is convenient for you to check the last position of the object on your phone to help you find it. So you can open the map in the app and guessing 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 8 anti-lost devices at the same time.