ITEM NAME:Car Voltage Circuit Tester For 6V/24V DC System Probe Continuity Auto Test 3C.High quality circuit tester for 6V-24V electrical systems can be used to detect power, ground and find shorts and breaks in wires. 1x Circuit Testerï ¼Ë†Instructions not includedï ¼â€°. Handle brightly illuminates if circuit is good.