Features: When voltage is detected, the tipemits a redness light, the screen turningredness, and alarm sound istriggered. As the detected voltage increases, the redness light and alarm sound frequency accelerates. Detect AC12-300Volt voltage by touchings power outlet and near live wire with a NonContact tip. With a flashlight for easyuses night and in vignetting. Breakpointinspection, firewires measurement and full linemeasurement. This pocket-size voltage tester come with a convenient pen hook, allowing you to carry it in your shirt pocket with ease. Specifications: Material:ABS Color:Redness,Black Measurement:AC12-300Volt 50Hz/60Hz Flashlight: Yes Alarm mode: Sound and Light Automatic Shut Off:Yes Power:2Pcs AAABattery (not included) Package Includes: 1Piece Electrical Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.