Feature: 1. High hardness and good electrical conductivity2. Maintenance electrical measurement / screwdriver assist3. Humanized design for easy electrical maintenance and portability4. Fully insulated anti-fall material, durable and improved safety performance5. 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 usedBattery model: LR41 X 3 (not included)Measuring range: voltage 70-250VProduct function:1. Neutral line/ line detection: the test result LED red light and green light indicate line, green light indicates neutral line2. Detection along the line: LED light on means the line is unblocked, LED light off means the line is disconnected3. Wire switch: if the plug and the inner core of the wire are intact, the light will be on, and if it is not on, it means that the core wire is in poor contactMaterial: Plastic + Metalcolour: transparentPackage Contents:3 x Electric PenOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.