Features: This LED high brightness buzzer sensing voltage tester pen features a bright LED light and a buzzer, making it easy to detect voltage. The durable LED light provides long lasting illumination, while the buzzer alerts users to potential hazards. Designed for electricians, maintenance personnel, and home users who need to test and measure circuits. Identify the live wires: the live wires indicator on, the 0 wire indicator is off. Strong adsorption to improve efficiency The strong magnetic designs of the head can adsorb screws and small metal parts to improve work efficiency. Specifications: Material:ABS Type:1222,1230 1222 Length:Approx.180mm/7.08'' 1230 Size:Approx.20mm0.79''x163mm/6.41'' Double head flat/cross are switchable Package Includes: 1x Voltage Tester note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.