1、 Mobile phone search: Bind the anti-lost device with valuables. When the device is connected to the mobile phone APP Bluetooth, use the APP's search function to make the anti-lost device make a sound to find the item. 2、 Find mobile phone: When the device is connected with the mobile phone APP Bluetooth, when you need to find the mobile phone, double-click the device button to call the mobile phone, and the mobile phone will make a sound. 3、 Two-way alarm: Turn on the "Anti-lost reminder" function 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, both the mobile phone and the anti-lost device will sound an alarm. 4、 Remotely take pictures: When the device is connected with the mobile phone APP Bluetooth, use the software's Selfie function to take pictures wirelessly. 5、 Breakpoint location: When the item is disconnected from the mobile phone APP Bluetooth, the APP will record the lost location of the item after the disconnection, and the lost location after the disconnection is displayed in the map in the APP. This anti-lost device is a product based on the new Bluetooth 4.0 low-power technology. By using the "iFindU" APP software to connect with mobile devices such as mobile phones, the user can easily lose items and valuables (such as keys, mobile phones, luggage, etc.) are bundled together to realize the functions of anti-lost reminder, two-way search, remote photography, positioning and other functions.After binding the anti-lost device to the APP, its use range is about 30 meters (open range). Because Bluetooth is interfered by the surrounding environment, its connection distance is different in different use environments.