STV1 Unit (Live tracking, history tracking, fuel cut, Geo fence, compatible with car security alarms)
STV2 Unit (Fuel tracking, two way voice, live photo, Temperature sensor, door sensor, live/history tracking, geo fence, bonnet sensor, each reports daily and monthly)
STV3 Unit (Fuel tracking with vehicle real fuel sensor or from external fuel sensor, RFID reader with passive cards and tags, barcode scanner, CCTV night vision camera, two way voice communication and tire pressure display )