The device connects to a car 's OnBoard Diagnostic ( OBD - II ) port ( all petrol automobiles in the USA built after 1996 have an OBD - II . ) .
The device transmits speed , time of day and number of miles the car is driven .
The device connects to a car 's OnBoard Diagnostic ( OBD - II ) port ( all petrol automobiles in the USA built after 1996 have an OBD - II . ) and transmits speed , time of day and number of miles the car is driven .