1、Versatile Tool: The non-contact ac voltage tester comes equipped with both flathead and phillips screwdriver tips, meeting your electrical testing and tightening needs efficiently in one tool. 2、Automatic Detection: This digital voltage detector pen can automatically distinguish between neutral and live wires or locate circuit break points. When placed near an AC voltage source, the buzzer will sound, with three frequency levels indicating signal strength. 3、Clear and Bright Display: The electric pen features a bright screen that displays clear readings, even in dim environments. The screen shows "--U" for strong and very strong signals, making it easy to read at a glance. 4、Accurate and Reliable: Our electrical pen locks data during measurement for easy viewing and recording. When the probe contacts a live wire, the display shows "HI" with a bright red backlight, and the buzzer emits a rapid beep, ensuring accurate and reliable results. 5、Safe in Low Light: The voltage tester pen is designed for safe use in dark or nighttime environments. The bright display and audible alerts ensure you can measure voltage confidently and safely, even in low-light conditions.