Tekonsha 50-85-313 Shur-Set III Breakaway System with LED Test Meter, Battery, Breakaway Switch and Charger For use on 1, 2 or 3 axle trailers equipped with electric brakes Push to test LED's indicate fully charged, charging or recharge Multi-Stage integrated charger provides a fast recharge up to 12.8 Volts Corrosion resistant, heavy-duty polymer case to protect battery and charger, with flat surface mount 5 amp/hour battery and breakaway switch with 7.5" Lead wires