Simple and compact size, delicate touch and skin-friendly, convenient to protect your items when travelling Two way anti-loss reminder. When the distance between the anti-loss device and cellphone is larger than the safe connection distance, two-way call alarm and timely reminds you to check your belongings One-key quick search, easy to operate. Within the range of connection, open the APP and click "Find", and the anti-loss reminder will give a sound immediately to facilitate the search Optimized audio algorithm, enhanced volume, find it back in time without losing it Support intelligent trajectory query. In the disconnection mode, open APP to check the recent disconnection position of the anti-loss device so that items can be traced. Rated voltage: 3V Rated current: 3.3mA Rated power: 10uW Volume: 80-100dB Polymer battery: 3V 75mAh