GPS module:SIRF III chip
GSM/GPRS module:850/900/1800/1900Mhz or 900/1800/1900Mhz
Protocol:NMEA-0183 compliant protocol
GPS Antenna:Build-in active high sensitivity antenna
GPS sensitivity ：-159dBm
Accuracy:1-5m
Update rate:1 HZ
Start time:Cold start: 45s
                   Warm start: 35s
                   Hot start : 1s
Wall charger 110－220V  input；5V   output
Battery:Polymer Li-ion 850mAh (built-in)
Standby ：80hours
Storage Temp ：-40°C to +85°C
Operation Temp ：-20°C to +55°C
Humidity 5%--95% non-condensing