1. 12300V AC Voltage Detection: Accurately detects AC voltages ranging from 12V to 300V. This wide voltage detection range makes it versatile for various electrical testing needs, ensuring it can be used in both residential and commercial settings. 2. NCV Induction: When the probe of the measuring pen is placed close to the AC voltage source, the buzzer sounds; The frequency of the buzzer has three levels, increasing with the signal strength. At the same time, the display screen will show ' U' and 'HI' when the signal is strong. With this function, you can search for wire breakpoints. 3. Flashlight and LCD Display: Integrated flashlight illuminates dark areas, and the LCD display shows clear readings with a backlight for visibility. The combination of a flashlight and a clear LCD display ensures that you can work in poorly lit environments and easily read the test results. 4. Dual Sound and Light Alarm: When the probe contacts a live wire, the display shows 'Hi' with a red backlight, and the buzzer emits a rapid beeping sound. The dual alarm system provides both visual and auditory warnings, enhancing safety and ensuring you are immediately alerted when a live wire is detected.