Product Description Specification Battery Model: LR41 X 3 (not included) Measuring Range: Voltage 70-250V Bit Material: Chrome vanadium steel Shell Material: ABS Size: About 140x20mm / 5.51x0.79in Features High hardness and good electrical conductivity. Assists in electrical measurement and can be used as a screwdriver. Humanized clip design for easy maintenance and portability. Durable, fully insulated anti-fall material improves safety performance. Self-checking LED high-brightness bulbs are clearly visible even in sunlight. Applications This product is versatile and can be used in: Electronic factories Electrical appliances Car maintenance Household tasks And many other settings Product Functions Neutral Line/Live Line Detection: LED red and green lights indicate live line, green light indicates neutral line. Line Detection: LED light on means the line is working, LED light off means the line is disconnected. Wire Switch: If the plug and wire core are intact, the light will be on; otherwise, poor contact is indicated. Note Please note the following: Due to different monitor and light effects, the actual color of the item may vary slightly from the images shown. Please allow a 1-2cm deviation in measurements due to manual measuring.