Saves all drivability codes and settings when disconnecting /changing a vehicles starter battery Direct wired OBD2 Connector plugs directly into the vehicles OBD2 Port 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 Vehicles manufactured from the year 2000 and later require a minimum of 10.5 volts DC to back up important memory and programming Includes 120V AC Smart Charger The Smart Charger allows the unit to function while charging, extending the on-time indefinitely Low power indicator LED Also protects settings and codes for: Anti-theft radios Clocks Keyless entry systems Alarms Cellular phone settings GPS Memory TPMS Tire Pressure Monitoring System Other memory related functions With FREE The Gripper Battery Lifter (EZR-BK530)