Working Based on existing (900/1800/850/1900Mhz)network 

1: SOS function 

2: Have 2 buttons for family speed dial

3: Real time tracking by GPS or base station(SMS/GPRS/TCP/UDP)

4: Can tracking by the PC/ platform, mobile phone and SMS.

5:  Support MP3, MP4 player.

6:  Support Digital frame 

7:  Support Alarm clock