Function: Used to check circuits and accessories on all 6V / 12V / 24V systems. Display: The emitting diodes do not generate heat when working, so you can use them easily. Alligator clip: The sturdy grounding clamp and insulator make it quick and easy to check the circuit. Properties: For checking circuits and accessories on all 6V / 12V / 24V-Volt systems. Wide range of uses: Widely used in cars, boats, trailers, vans, RVs, motorcycles, airplanes and snowmobiles.