1. WIDE TESTING RANGE VOLTAGE POLARITY TESTING3 72v low volt circuit test light, designed for checking various vehicles' electrical circuits, such as automotive headlights, taillights, faulty sockets, fuse, also for other 3 72V DC wiring and circuits. This is also a bidirectional voltage tester with 2 color LED lights for volt polarity indicating. 2. COMPUTER SAFE BACKLIGHT DIGITAL DISPLAY PART circuit light tester with highly clear LCD digital blue backlight display screen, resolution to.1V voltage reading with high accuracy to ±0.2V, clearvisible digital readouts for day and night. The test light draws much less current than the incandescent lamp, which is less likely to damage sensitive circuits. 3. ANTI LOST PROBE PROTECTIVE TIP QUALITY MADE TESTER BODYSharp stainless steel probe for piercing wires effortlessly, also for hard to reach tight areas, while along with an integrated design anti lost protective rubber tip. Professional automotive circuit tester with premium acetate fiber body, allows for more toughness and durability. 4. EXTENDED PU SPRING LARGE ALLIGATOR CLIPHigh quality 140 inch long enough PU spring wire more flexibility, lighter and more durable than normal cable wires, heat insulation and oil resistance for daily use. Attach with large size alligator clip for easy one hand operation, also for convenient use and storage.