For maintaining voltage continuity to the engine computer, clock, and radio memory when the vehicle battery is disconnected

Includes instructions for perfect results

Works on all vehicles with an OBD ll port(1996 or newer)

Better results than 12v cigarette outlet models due to standardized OBD ll wiring (not all 12v outlets are wired up the same, some require key on for example)

A voltage-blocking diode installed for safe use prevents vehicle 12 volts from damaging the 9-volt battery. Power can only flow out of the battery not in.

Detailed Instructions Included

Assembled in the USA