Description: Multi Functions: Zero or live wire determination, line breaking point judgment, electrical switch detection, contact voltage sensing, voltage detect pen can accurately detect voltage, effectively prevent the risk of shockSize: With a compact size of 139mm, the voltage tester pen is easy to handle and carry around, making it good for both professional and DIY useUnique design: The unique design of this Electric Pen Circuit Tester Pen allows double hand work, providing more stable and Detection, is an ideal tool for electriciansBright Light: The screwdriver electric pen tool is designed with high brightness light indicators, which makes measurement easier and clearly visible even in sunlight during the dayVersatile & Portable: Compact size electric test pen tool is convenient to carry whether you use it at home or take it out for working. Can be used in electronics factory, electrical appliances, automobile maintenance, household use, electricians tools Specification: Material: Metal Size Chart: 13.9cmx1.93cm/5.47inchx0.76inch Package Includes: 2 Electrical Tester Pen Note: Please allow slightly errors due to manual measurement and different monitors.