1. This is an equipment used to test the automotive electrical system within 6 to 24V 2. Determine the polarity and circuit circumstance (short/open) 3. Activating the components with positive or negative current without jumper wire 4. Testing the voltage and continuity of the circuit illumination 5. Include a cigarette lighter adapter, a hook-up clip, an extension probe (85mm), and extension 20 feet lead