Professional Cordless Circuit TesterSuitable for testing DC circuits from 3v to 28vNo ground wire or clips requiredUnique V-groove needle accessory for wire piercingThree-way voltage indication - Illuminates LED, buzzes and vibrates on contact with live wireSolid state lamp for longer lasting performanceSafe to use on Engine Management systems - e.g. ECM’s, Sensors, Transducers etcSupplied with long-life alkaline batteries