1. Zero-contact Voltage Detection: The electric tester pen features -sensitive lamp head for socket testing. The green light indicates the neutral wire, while the red and green lights indicate the live wire. This allows for safe and accurate identification of electrical connections. It can be used in electronics factories, electrical appliances, car maintenance, household appliances, etc., with a wide range of uses 2. Voltage Sensing: When the voltage tester pen detects voltage, the green indicator light illuminate. This feature provides a quick and reliable way to verify the presence of electricity in various applications. 3. Breakpoint Identification: By following along the wire, you can identify breakpoints where the green light disappears. This makes household screw driver easy to locate areas of disconnection or damage in electrical circuits. 4. Bright Bead Illumination: The multi-functional screwdriver is equipped with high-brightness operation beads, ensuring clear visibility even in sunlight. This feature enhances measurement accuracy and ease of use in various lighting conditions. 5. Electrical Switch Testing: By touching the contact rod with the non-contact induction test pencil , you can check if the core of the wire is undamaged. If the LED green light illuminates, it indicates that the wire's core is intact. If there is no light, it suggests poor contact with the wire's core. The screwdriver is designed for easy portability, allowing you to carry it wherever you go. Colour:As Shown Material:Plastic + Metal Package Contents: 10 x Screwdrivers electric tester pen 10 x straight Screwdrivers electric tester 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.