Features Multi-Function Testing Capabilities: This device allows for neutral and live wire judgment, line detection, and features a self-check function for enhanced usability Integrated Screwdriver Bit: Designed with a slot screwdriver bit for easy assembly and disassembly, making it a versatile tool for various electrical tasks High-Visibility LED Light: The transparent shell houses a bright LED lamp, providing clear visibility for easy measurements in any lighting condition Superior Safety Features: Built with an intelligent motherboard chip and advanced control program, ensuring high safety standards and prolonged service life Convenient Carry Design: Equipped with a practical pen clip, this tool is easy to carry and access, making it ideal for on-the-go electrical work Features: 1、Multi Function: This inductive voltage test pen can be used for neutral live wire judgment, line on off detection, has self check function. 2、Slot Bit: The pen head is slot screwdriver bit designed, with the diameter of m, convenient to , assemble and disassemble. 3、High Brightn: The pen shell is transparent, built in high brightn LED lamp bead, intuitive for testing, makes the measurement easier. 4、High Safety: Adopt intelligent motherboard chip and profionally upgraded chip control program, have higher security and longer service life. 5、Pen Clip Design: This electrical test pen is more convenient to carry around when working, with thoughtful pen clip design. Specification: Item Type: Electrical Tester Pen Material: ABS, chrome vanadium steel Neutral Live Wire Judgment: Yes Line On Off Detection: Yes Self Check Function: Yes Slot Screwdriver: Yes LED Lamp Bead: Bright green lamp bead Measuring Range: Voltage 70-250V Bit Diameter: Approx. m/0.1in Battery Model: 3 x LR41 button battery (built in) Capacity: 40mAh (single battery capacity) Package List: 5 x Electrical Tester Pen Package List 5 x Electrical Tester Pen