Power Probe III O7859

Easy to read backlit Voltmeter allows you to read voltage at the tip eliminating wasted time running to your toolbox for a voltmeter! Standard 4 mm jacks ensures full compatibly with the Gold Series Lead Set as well as all other 4 mm leads, plugs and jacks already in your tool box. Press the rocker switch forward and you will have a hot lead for powering up electrical components like cooling fans, relays, press the switch rearward and you will have an instant ground lead. The polarity tester instantly identifies positive, negative and open circuits. Instantly check continuity of switches, relays and diodes.