1)easy to install
2)accurate GPS positioning, dynamic positioning deviation is less than 5 m
3)support GSM voice and SMS functions, UDP / TCP protocol communications in GPRS mode
4)support the GPS data uploading at intervals and location
5)support the two way voice communication function
6)support Call Barring of group numbers function
7)support two way SMS communication via Mobile and PC software
8)support the mute function
9)support authorized tapping function
*0)support protection from high or low level voltage function
*1)support 5 levels of signal detection
*2)support the data resend from signal dead zone function
*3)support remotely locking vehicle function
*4)support watching vehicle function
*5)support emergency alarm function
*6)support the power-off alarm function
*7)support the high-voltage under-voltage alarm and alarm functions
*8)support over speed alarm function
*9)support parking alarm function
*0)support illegal door-open, illegal engine-start alarm function
*1)support fuel consumption detection
*2)support fuel changing alarm
*3)support mileage statistics
*4)support Geo-fence alarm
*5)support fatigue driving alarm
*6)support temperature detection alarm
*7)support three serial peripherals (such as the car handles, scheduling screen, camera )

Hardware parameter
working voltage	8VDC~*6VDC
Working current	*0mA~**0mA
GSM module	inside contain frequency GSM **0/***0 inside contain frequency GSM **0/**0/***0/***0Mhz (can tailor)
Communication protocol	UDP/TCP(can customize)
GPS module	GPS SIRF-Star III CMOS chip group
GPS sensitivity	***9dBm
GPS frequency	L1, ***5.*2 MHz
C/A coding	1.**3 MHz chip rate
Channels	*0 channels for tracking
Position accuracy	*0 meter, 2D RMS
Speed  accuracy	0.1 meter/second
Time accuracy	GPS synchronization
Default data	WGS**4
Recover	Average 0.1 second
Hot start	Average 1 second
Warm start	Average *8 second
Cold start	Average *2 second
Height limit	*8,**0 meter (*0,**0 feet) max
Speed limit	**5 kilometer/second (***0 knots)max
Acceleration limit	Less than 4g
Expansion peripheral	Peripherals can be accessed by an extension (such as: Handle / scheduling screen / camera etc.)
Others
Work temperature	**0°~ *0° C
Storage temperature	**0°~ *5° C
Humidity	5% ~ *5%  non-condensing
Terminal size	*7 mm × *4mm × *4mm
Inside battery	Continuing working not less than 4 hours
LED light	Red: power-on state:yellow:communication module state:green:GPS module working state