Product Features: 1. Object finder function: Link the anti-loss device to valuables. When the device is connected to the mobile phone’s Bluetooth app, use the search function of the app to make the anti-lost device make a sound to find the item. 2. Mobile phone search function: When the device is connected to the mobile phone Bluetooth APP, and you need to search the mobile phone, double-click the button on the device to call the mobile phone, and the mobile phone will beep.