- Connect mobile phone Bluetooth, two-way search function, you can connect 7 anti-lost devices at the same time. 2. When the anti-loss device exceeds the set Bluetooth range, the mobile phone and anti-loss device will be triggered at the same time. 3. When the device is disconnected, you can view the map location on the phone. 4. Provides an anti-interference function that can be silent for a period of time to prevent the anti-lost device from controlling the cell phone recording function when working and remote selfies. 5. Control the cellphone recording function through the anti-lost device.