GPS+Wifi+LBS with speaker for 2 way SOS, 850mAh

PCBA:ZX303

Network: GSM 850/900/1800/1900(Nano sim card)
1.GPS+AGPS+LBS+WIFI,support TF card
2.Main Chip: MTK MT2503D
3.Assisted Chip: MT3333 + MT5931
4.SOS, Voice recording/monitoring
5.Make and Receive Calls
6.Geo-Fence
7.90days History Playback
8.Alarm Clock, Class Mode，Power Save
9.Vibration Alarm，Low Battery Alarm
10.Voice-activated dial-back call to supervision numbers
11.Voice Monitor Call
12.Tracking System：APP+Web+SMS
13.Voice-activated Auto Recording to FTP
14.Multi-languages: English/French/Russian/Spanish/Portuguese/Polish