Provides useful debugging and testing in many systems, most notably vehicles, boats, motorbikes, and other 6-24V systems. It provides an accurate voltage readout as well as polarity check. It's a more advanced version of a test-lamp used for decades in the automotive industry. Self powered from the test circuit. Specifications: Width : 228mm Diameter : 30mm Cable length : 50mm Weight : 125g Packaged Volume : 1.41l Packaged Weight : 0.17kg Packaged Length : 30.1cm Packaged Width : 10.9cm Packaged Height : 4.3cm Tests powered-on circuits Works on 6V, 12V, and 24V systems Stainless steel testing probe LED Indicators: Green (-), Red (+) Operating Current: 12VDC 70mA