TRUSTED TESTING: Test load, battery condition, and starter motor draw; 50 Amp load test for 6V batteries and 100 Amp for 12V batteries; tests up to 1000 CCA COMPLETE DIAGNOSIS: Delivers a complete charging system diagnosis for batteries in cars, small trucks, RVs, motorcycles, ATVs, boats, and lawn tractors SIMPLE OPERATION: Top-mounted rocker switch for ease of use and highly visible meter readings HEAVY-DUTY CLAMPS: Super-grip, heavy-duty, color-coded battery clamps STEEL CASE: Durable steel case with baked enamel shell and rubber-insulated carrying handle; ventilated to stay cool.