Cordless Circuit Tester This unit does not require ground wire or clip and is safe with ECMs, Sensors, Transducers, Airbags, etc. . Designed to be used on DC powered circuits with voltages between 3 and 28 volts.. Special designed V-Tip needle allows safe piercing and prevents side-slipping when piercing wire's insulation. V-Tip can be removed to test hard to reach places.. Unit works with replaceable long-life alkaline batteries.. Made of rugged chrome metal. 7760 Yes - GASOLINE ENGINE EXHAUST (CONDENSATES/EXTRACTS)