Loss prevention device looks beautiful fashion. Bluetooth connection with mobile phone, two-way search function, can be connected to 8 sets of Loss prevention device. In the connected state, when the Loss prevention device exceeds the set bluetooth range, the phone and the Loss prevention device will alarm at the same time. Mobile phone can check the map location when the Loss prevention device is disconnected. Provide the function of no disturb, can set the silence within a certain period of time, to prevent the interruption in work and other important time. Through the Loss prevention device to control the phone shooting function, remote selfie and recording function. bluetooth new 4.0 technology, very low power consumption, A:CR2032 button battery power supply, B:CR2025 button battery power supply, standby more than 10 months, easy to replace. Support OS system and ANDROID system 4.3 or above (bluetooth 4.0 required)