Alternator Regulator 6 12 V Battery Load Tester Testing Detail read-out and easy-to-see warning labeling. Battery "State of Charge" and "load" test Alternator / regulator output test.; Using on Car, Van, Truck, Boat and Motorcycle Reverse polarity indicated at needle; Side post extensions at clamps Hold load on 10 seconds.;Color-code meter scale.; Pistol grip handle