Features Multi Function: This inductive voltage test pen can be used for neutral live wire testing, line on off detection and so on. Fine Tip: The pen head is screwdriver bit designed, with the standard size, convenient for contact, assemble and disassemble. High Brightness: Built in high brightness LED lamp bead, intuitive for testing, makes the measurement and operation much easier. High Safety: Adopt intelligent motherboard chip, the screwdriver test pen have higher security and longer service life. Convenient Carrying: Comes with a compact size and a light weight as well, the electrical tester pen is very convenient to carry around. Spec: Item Type: Electrical Tester Pen Model: B04 Material: ABS, chrome vanadium steel Battery: 3 x LR41 button battery, with built in battery. Single Battery Capacity: 25mAh PackageList: 6 xElectrical Tester Pen Package List 6 x Electrical Tester Pen