Product Specifications: Battery model: LR41 X 3 (included) Measuring range: voltage 70-250V Drill bit material: chrome vanadium steel Shell material: ABS Size: about 140x20mm/5.51x0.79in feature: 1. High hardness and good electrical conductivity 2. Repair power meter/screwdriver help 3. Humanized clip design for easy electrical maintenance and portability 4. Fully insulated anti-fall material, durable and improved safety performance 5. Self-controlling LED high-brightness lamps: high-brightness works smoothly and is still clearly visible in the sun Uses: Can be used in electronics factories, electrical appliances, car maintenance, households, etc., with a wide range of uses Package includes 1*Test pen Product Features: 1. Neutral/live wire detection: the test result LED red light and green light indicate the live wire, and the green light indicates the neutral wire 2. Detection along the line: LED light on means the line is unblocked, LED light off means the line is disconnected 3. Wire switch: if the plug and wire core are in good condition, the light will be on, if not, it means the core wire is in poor contact Comment: Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. Thanks! Please allow 1-2cm measurement deviation due to manual measurement.