1) The smallest size in the world: 40mm x 30mm x 12.5mm.
2) Waterproof level IP 67.
3) Delicate appearance and comfortable materials.
4) Real-time tracking.
5) Low-power consumption, working time reach 30 hours (according to default interval mode).
6) Two way voice communication.
7) Preset three dialing number.
8) Build-in G-Sensor for saving the battery.
9) Double locating: GPS and LBS (positioning when under buildings)
10) Build-in flash memory for data storage.
11) GEO-Fence/safety zone alarm.
12) Emergency alarm.
13) Available for voice monitoring.
14) Battery standby time is 4 days.