Digital Voltage Detector Pen Voltage Tester Electrical Pen Zero Live Wire Tester 1. Versatile Tool for Electrical Testing: The voltage phase sequence measuring pen comes with dual-purpose screwdriver heads (Phillips/Flathead) to meet both electrical testing and fastening needs, allowing quick AC voltage measurements from 12 to 300V with ease. 2. Reliable Voltage Detection: The voltage detector pen features dual sound and light alarms that activate upon contact with live wires. The screen displays HI with a red backlight and emits a rapid beeping sound for clear voltage presence indication. 3. Comprehensive Voltage Testing: The voltage tester offers NCV (Non-Contact Voltage) detection, which increases the sound frequency and displays I-U and HI on the screen as the signal strengthens, making it ideal for finding wire breakpoints and ensuring system stability. 4. Enhanced Safety and Functionality: The electrical pen ensures safe operation with its phase sequence measurement capability, preventing equipment damage and enhancing system stability. The LED light provides illumination in dim environments for safe and efficient work. 5. Clear and Convenient Display: Equipped with a bright, high-definition screen, the breakpoint finder allows for easy reading in low-light conditions, making digital readings clear and straightforward, even in complex environments. Specification: Display Type: Digital Only Working voltage: AC voltage 12~300V, 50/60Hz Measurement error: 12-300V ± (5% + 3) Use environment: Working temperature: 0~40 degrees Storage temperature: -10~50 degrees Humidity: ≤95% Altitude: ≤2000 meters Safety level: CAT.II 300V Power supply: 1x1.5V AAA battery (not included, need to bring your own) Casing material: ABS Product size: about 172.00x27.00x24.00mm Product size: 6.77x1.06x0.94inch