Feature: 1. High hardness and good electrical conductivity2. Maintenance electrical measurement / screwdriver assist3. Humanized clip design for easy electrical maintenance and portability4. Fully insulated anti- material, durable and improved safety performance5. -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 usedSpecification:Battery : LR41 X 3 (not included)Measuring range: voltage 70-250VBit material: chrome vanadium steelSize: About 140x20mm/5.51x0.79inColor: transparentmaterial: plasticProduct function:1. Neutral line/live line detection: the test result LED red light and green light indicate live line, green light indicates neutral line2. Detection along : LED light on means is unblocked, LED light off means is disconnected3. 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 the core wire is in poor contactPackage Contents:4 x Electrical Tester PenOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.