Multi-features: Component Flexibility. Voltage Detection. Diode Detection. Continuity Testing. Ground Detection. Tracking to locate short circuits. Positive and negative detection. Overload Protection. Lighting. Sound Alert. LCD High Definition Display: When the probe detects a positive pole or performs a positive activation, the front red LED lights up with a blue LCD voltage display. When the probe detects a negative terminal or performs a reverse activation, the front green LED lights up with a blue LCD voltage display. Lighting Design: Unique design for easy maintenance lighting at night. Easy to use at night. Wide Range of Products: Support all 6-24V electrical system testing, including cars, pickup trucks, off-road vehicles, motorcycles, construction vehicles, boats, etc.