diehard, 12v, 2a, maintainer, battery charger, 10 to 15 amp variable fast charge, fully automatic, microprocessor controlled, float mode monitoring keeps battery at optimum charge level by providing just enough power to keep the battery at the proper voltage, easy to use touch pad controls with touch of a finger, select the display mode, battery type & charge rate, 50a clamps for top & side mount battery posts, reverse hook up. non-compliant in ca & or.