Saves all drivability codes and settings when disconnecting a vehicle’s power (battery.) Direct wired OBD2 Connector 12 volt 4.5 amp hour sealed lead acid battery included inside unit Power on / power off switch LED indicates connection to circuit Protected by a 4 amp circuit breaker Includes 120V AC charger Also protects settings and codes for anti-theft radios clocks keyless entry systems alarms cellular phone settings and other memory related functions - SKU: WTD827