AC SUPPLIED WHEELED -6-12 volt.DC .Jumper Charger.Note 450 amps makes this a powerful unit.Excellent condition.HD unit.No longer needed and seen light use.pics will show its capabilities and setting. .Large amps needed on super cold starts AC supplied unit has a constant output of amps needed when need more than a one chance to start.Never let me down.Components made in USA Calls only 863-1155