[Wider Voltage Range] Compared with the automotive electrical tester on the market, the maximum voltage measured is only 48V, but our technology can measure the maximum voltage upgraded to 72V. AWBLIN circuit test is very suitable for checking various vehicle circuits, quickly checking car headlights, taillights, turn signal circuits, faulty sockets, fuse connections, and can also be used to test other 3-72V DC lines and circuits.[Unique Design-Lighting and Anti-lost Needle Protection]: As an appropriate solution for night test work, the electric test pen comes with a lighting function to support your testing needs in low-light environments. In addition, a needle protection function is added to ensure that there will be no punctures and the protection device will not be lost.[LED Indication, Bidirectional Voltage Test]: This upgraded circuit test light is a bidirectional voltage tester. You can connect the alligator clip to the negative or positive pole, and there is also a light-emitting diode on the circuit board for polarity indication, the red light indicates the positive pole, and the green light indicates the negative pole.[Intuitive LCD Backlit Digital Screen]: This heavy-duty circuit light tester features a high-definition LCD digital blue backlit display with a resolution of 0.1V, and clearly visible digital readouts during both day and night.[Waterproof, Sturdy and Safe]: This is a professional automotive circuit tester with an IP66 waterproof rating. The high-quality PU spring wire can be stretched up to 142 inches, which is environmentally friendly and highly elastic; the wire end adopts a PA nylon anti-bending design structure, which is more sturdy; the sharp stainless steel probe with insulating sleeve has better conductivity to prevent accidental injuries. Use this test light to make your life more convenient and safer![100% Satisfaction]: If you are dissatisfied for any reason, please feel free to let us know and we will do our best to help you.