Push to test LED’s indicate fully charged, charging or recharge multi-stage integrated charger provides a fast recharge up to 12.8 Volts. Once battery is fully charged the automatic float mode is designed to provide a continuous charge without overcharging. Activates trailer brakes upon separation of trailer and two vehicle for use on 1, 2 or 3 axle trailers equipped with electric brakes weather/corrosion resistant, heavy-duty polymer case to protect battery and charger quick and easy to install breakaway switch w/7.5″ Lead wires 5 amp/hour battery battery box, dimensions – 5″ x 4.125″ X 4″ flat surface mounting (note optional post mount bracket available) 1 year limited warrantyNote make sure battery is fully charged prior to towing.