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 functionSOS functionGSM module:MTK CHIPSET, GSM 850/900/1800/1900 dual-band or quad-band GPS chip:SIRF3 chipGPS sensitivity:-159dBmGPS accuracy:5m~10MTime To ...