Working voltage range:9～40V
Working current range:

1) Static working current：  60mA
2) On-line working current：120mA
Working temperature range：-20℃~+55℃
Wireless communication parameters

1) SIM card working voltage：3V and 1.8V
2) Frequency：Three Frequencies GSM/GPRS 900/1800/1900MHz
3) Support GPRS and short massage
GPS Module parameters

1) Cold start time ＜200s
2) Hot start time ＜120s
3) Positioning accuracy ＜15m

4) Speed accuracy＜0.05m/s
Anti-Electro-maganetic Interference: 80~1000MH,1KHz Sine Wave80%AM, 10V/M FS (field strength) interference
Electrostatic discharge specification: 6KV touch discharge,  8KV air discharge