Feature: 1. High hardness and good electrical conductivity 2. Maintenance electrical measurement / screwdriver assist 3. Humanized clip design for easy electrical maintenance and portability 4. Fully insulated anti-fall material, durable and improved safety performance 5. Self-checking LED high-brightness bulbs: high-brightness works smoothly and is still clearly visible in the Uses: can be used in electronic factories, electrical appliances, car maintenance, household, etc., widely used Specification: Battery model: LR41 X 3 (Not included) Measuring range: 24-250V Bit material: chrome vanadium steel Material: plastic + metal Color as shown Product function: 1. Neutral line/live line detection: the test LED red light and green light indicate live line, green light indicates neutral line 2. Detection along : LED light on means is unblocked, LED light off means is disconnected 3. Wire switch: if the plug and the inner core of the wire are , the light will be on, and if it is not on, it means that the core wire is in poor contact Package Contents: 4 x Detector Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.