Positioning by GPS+ base station+ WIFI+ A-GPS+ acceleromter;                                                

App: Andriod, IOS;                                              

Supported Nano SIM card only;                                              IP67,                                                                             

battery: 300mAh,                                                             Function:                                                                  

1.real-time positioning, trackig and monitoring by GPRS;                                                           

2.family contacts;                                                                   

3.two-way talk,                                                                                           

4.voice  intercom,                                                              

5.wechat voice chat,                                                                                                     6.health monitoring,                                                                                              7.steps recording,                                   

8.alarm clock,                                                           

9.setting of safety zones,                                                         

10.SOS emergency alarm,                                                      

11.low-battery alarm,                                  

12.remote power off