Test 6, 12 and 24 volt battery, charging and starting systems with a tester that is built tough for the shop environment.Large LCD displays for readability. Controls are easy to understand and use. Ten foot leads fit larger vehicles.Welded steel case has a baked powder-coat finish for durability, large rubber feet for stability, and a broad handle.The high capacity inductive amp probe has two ranges to measure from 100 Milliamps up to 1200 amps. A 1" x 3/4" opening fits around large battery cables and wire bundles. The amp probe is plug-in replaceable.A Load Timer Lamp flashes once per second while load is on. Beeper sounds after 15 seconds of load.Diode/Stator Lamp lights when amp probe senses ripple. Quickly shows bad alternators.Carbon Pile Load Control knob sets current to a stable test amperage. One turn control and spring detent off position for easy operation. Fan cooled for heavy duty service.Side handle cable exits make hookups easier and more secure. Heavy duty contacts and fine copper cable for long term service.External Volts Leads allows voltage measurements anywhere around the engine. Ten megohm impedance protects vehicle circuits. Switch selects external lead clips or battery voltage.600 Amp Load. Inductive 1200A Probe. Amps Ripple Indicator. Load On Timer. Stand Included. Fan cooled.