Vehilce GPS tracker system

This tracker is a newly product based on the GSM / GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entirety.
Function Description

*View map on cell phone, PDA, view target current location on map on the cell phone and PDA with the maps link in the message from tracker.
*Get location in real street/address name, send "address+password to tracker, tracker will reply detailed street address, e.g. No.113, Nantou guankou 2nd Rd, Nanshan, shenzhen, china.
*If your target enters into underground parking lot or other GPS blind area, the tracker will inform you the last orientation.
*Remote Engine-stop and Resume.
*tracking function by timing and frequency
*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.
*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.
*Power supply disconnection alarm.
*Low batttery alarm function
*Check the vehicle status
*Set up "ARM" & "DISARM" State by remote control for DOOR ALARM, ACC ALARM, SENSOR ALARM.
Optional function:
*Quiver alarm
Applying directions:
 Vehicle fleet/logistics/Vehicle rental 
Technology parameter:
*Dimension: 83mm*54mm*26mm, 120g in weight
*GPS chip: SIRF3 chip
*channel: Parallel 20 channels
*sensitive: -159dBm
*Accuracy: 5m
*Time To First Fix   Cold status 35s,Hot status 1s
*GSM Network frenquecy: 850/900/1800/1900Mhz or 900/1800/1900Mhz