Tekonsha 50-85-325 Shur-Set III Breakaway System with LED Test Meter, Battery, 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 Weather/corrosion resistant, heavy-duty polymer case to protect battery and charger, with 3 versatile mounting options 5 Amp/hr Battery and Breakaway Switch with 7.5" lead wires