Features: The voltage tester is a practical tool for quick and accurate measurements. Keepings safe with its noncontact designs, eliminating the risk of electric shocks. Humanized pen clip designs is convenient for electrical maintenance and carryings. Suitable for homeowners, maintenance personnel, and DIY enthusiasts, anyone in need of simple and efficient measurement. Automatically distinguish neutral wire from the live wire (L). When the pen head sense and detects voltage, the white part of the pen head will glows and beeps. It is easy to detect fire wire and know which line have danger voltage. There is a button in middle of the inductions pen. When you press it, there is a bright LED at the head of the pen that will glows. In a dark working place, you can easily complete the work. Specifications: Material:ABS Measuring ranges: AC90V-1000V Power:2Pcs AAABattery(not included Size:Approx.152mm/5.98'x22mm/0.87'x17mm/0.67' Package Includes: 1x Voltage Tester Pen note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.