Detailed description:
It is based on GSM/GPRS（850/900/1800/1900MHZ）wireless telecommunication internet and GPS satillite global position system,track by several ways.provide monitor software and global map.real-time track through the monitor software in your pc;track through your PDA cell phone and googleearth.

Features and functions
◆Small size, easy to hide. dimension:83mm*54mm*26mm,weight:120g ◆Support orientation without orientated server: it can find out Real-time      longitude and latitude, time and speed. By using public map software and    entering longitude and latitude manually, you can find out the real-time information of position.         
◆If the target you are inquiring enters into underground parking lot or other GPS blind area, the tracker will inform you the last orientation.
◆Absolute street address by SMS
Track with limited times upon time interval
◆Track with unlimited times upon time interval
◆ Smart track upon time and distance interval
◆Remote Engine-stop and Resume
◆Active and deactive DOOR ALARM, ACC ALARM, SENSOR ALARM by remote control
◆tracking function by timing and frequency
◆Remote reset by SMS command & reset button on the device
◆Input Power: 12V-24V DC
◆GSM/GPS LED indicator
◆Authorized number added and deleted function
◆Support hidden alarm and monitor function
◆Geo-fence: Set up a geo-fence for the unit to restrict its movements within a district. The unit will send the message to the authorized numbers when it breaches the district.
◆Power supply disconnection alarm.
◆Door alarm
◆ACC alarm
◆Movement alert: you can set up barriers when the vehicle is stopped. once moved, it can give an alarm to the authorized number.
◆Over speed alarm: you can make the inspected target run according to fixed speed. It alarms when speed is exceeded.
◆Low batttery alarm function
◆Check the vehicle status
◆Multi area management
◆Automatic update positions of vehicle turns
◆Data logging
◆Forward third parties message to authorized phone number and charge inquiry
◆Configure parameters by USB
◆Less GPRS traffic
◆ACC working alarm
◆GPS drift suppression

Optional functions:
◆Quiver alarm
◆siren/horn
◆Accident alarm

Applying directions:
 Vehicle fleet/logistics/Vehicle rental 

Technology parameter:
◆GPS chip: SIRF3chip
◆GPS sensitivity:   -159dBm
◆GPS accuracy :5m
◆Time To First Fix   Cold status 45s,Warm status 35s,Hot status 1s
 

And there is 4 tracking solutions:
◆SMS tracking on cellphone with a googlemap link to view current location on map on cellphone screen.  
◆Get absolute address by SMS
◆PC Installation software tracking.   
◆Web server online tracking www.gpstrackerxy.com