GPS Tracker
1.SOS Function
2.Electronic fence alarm,real time ,date ,map information
3.Base station
4.Postioning function

Can communicate like a telephone,no need earphone.
Support SMS communication and GPRS TCP connection.
Battery saving function
SOS function
GSM module:MTK CHIPSET,
GSM 850/900/1800/1900 dual-band or quad-band
GPS chip:SIRF3 chip
GPS sensitivity:-159dBm
GPS accuracy:5m~10M
Time To First Fix:Cold status 45s,Warm status 35s,Hot status 1s
charger 100-220V input,5V output  
Battery Chargeable changeable 3.7V 1280mAh Li-ion battery
Dimension:95mm*46mm*18mm