... location based service)12. LED Advertising Screen, RS232 Printer, Temperature sensor, RFID (optional) Positioning and tracking: through the online ... Input port( Fuel monitoring)1 Output port ( Car engine control )3 Extend ports ( Input/Output control by ... hours)AccessoriesDevice, Connecting cable ,GPS antenna ,GSM antenna, Engine controller, SOS button, Microphone, Camera, LED advertising display( ...