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/hr Battery Battery Box, dimensions - 5" x 4.125" x 4" Flat Surface Mounting (Note optional post mount bracket available) 1year limited warranty Note Make sure battery is fully charged prior to towing.