The E-Z Red Super Computer Memory Saver, No. EZRMS4000, saves all drivability codes and settings when disconnecting or changing a vehicle's starter battery. The direct-wired OBDII connector plugs right into the vehicles OBDII port. Protected by a 4-amp circuit breaker, the unit includes a 120V AC smart charger. A 12V, 4.5 amp hour-sealed, lead-acid battery comes included inside the unit, with an amber LED to indicate when the battery is low.