Fully functional tool that was used for demonstration purposes. The Power Probe III Circuit Test Kit features everything you need to diagnose 12 to 24 volt automotive electrical systems and is a must-have for any auto technician. Simply attach the PP3’s clips to the vehicle’s battery, and easily perform electrical system diagnostics such as: activating and testing component function, determining the voltage level and the polarity of a circuit without running for a voltmeter or reconnecting hook-up clips from one battery pole to the other, testing for bad ground contacts instantly without performing voltage drop tests, following and locating short circuits without wasting fuses, and testing for continuity with the assistance of its auxiliary ground lead. Enable the audio circuit monitoring feature to identify positive circuits with a high pitch and negative circuits with a low pitch, or disable the feature if you prefer. The built-in LED flashlight also comes in handy to brighten your workspace. You won’t regret owning such a reliable, multi-functional kit. The digital voltmeter is available in solid red, carbon fiber pattern, or flames pattern. The kit also includes a 20-foot extendable power cord and a 12-volt automotive electrical system, so you have complete mobility around your vehicle. The PP3 and all included accessories are easily stored in the heavy-duty blow-molded case so you can stay organized and carry it with you wherever you need it. The Power Probe III Circuit Test Kit has it all! With so much functionality, it is amazingly easy to use. No need to waste time with jumper leads, simply flip the switch up for an instant hot lead to the tip, or flip the switch down for a ground lead. Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.