GPS-901VT GPS/GPRS/SMS Vehicle Tracker --- Available For Both DIY Tracking & Call Center/Web-Based Tracking Functions GPS Position Tracking Function In-Car Monitoring Function Geofense Park Function SOS Emergency Help Call Function Six Sets of SOS Help Call Function Bi-Direction Phone Conversation Function DIY Location Tracking via Your Own PC/NB/PDA Features: GPS Locator for DIY Tracking * GSM/SMS/GPRS communiction * Remote command control via mobile * Track on internet real-time via GPRS * Locate and track your car all the time * True real-time tracking and monitoring * DIY GPS Tracking, without call center * No monthly service charges to be paid * Use your own PC, NB, or PDA to do the tracking * Available also for call center or web-based tracking * Can receive phone calls for bi-direction conversation * SOS function to summon help to the exact location/place * Report vehicle position at a preset time interval to your PC * MS tracking mode, or real time GPRS tracking mode, or GSM mobile mode available * Monitor the sound in car remotely by mobile by sending a SMS code to AVL, w/o interfering the one in car * Park function to send SMS to the preset phone#, when someone moves the car w/o permission for over 50M