1. Item Finder Function: Link the anti-lost device with valuable items.When the device is connected to the mobile phone Bluetooth APP, use the APP search function to make the anti-lost device make a sound to find the item.2. Find mobile phone function: When the device is connected to the mobile phone Bluetooth APP and you need to find the mobile phone, double click the button on the device to call the mobile phone, and themobile phone will make a sound.3. Two-way alarm: Set and open the "Bluetooth Disconnect Alarm" switch in the software to realize two-way anti-lost.When the device is connected to the Bluetooth of the mobile phone APP, if the Bluetooth of the mobile phone and the anti-lost device are disconnected, the mobile phone and the anti-lost device will sound an alarm.4. Selfie function: When the device is connected to the mobile phone Bluetooth application, use the Selfie function of the software to take photos wirelessly. Recording function: double-click the switch button on the deviceto save in the APP.5.Disconnect location: When the item is disconnected from the mobile phone Bluetooth APP, the APP will record the lost location of the item after disconnection, and the lost location will be displayed on the map in theAPP.