Features 1、[Wide Range] This voltage tester pen can accurately detect AC voltage from 12V to 300V, meets various electrical testing needs, ensuring it can be used in residential and commercial environments. 2、[NCV Sensing] When the test pen probe approaches the AC voltage source, the buzzer emits a sound; the buzzer frequency is divided into three levels, increasing with signal strength. At the same time, the display screen will display U or HI when signal strength is strong, allowing you to search for breakpoints. 3、[Flashlight and LCD Screen] Integrated flashlight can illuminate dark areas, while the backlit LCD screen displays clear readings, enhancing visibility. The flashlight and clear LCD screen combine to ensure you can work in low light conditions and easily read test results. 4、[Sound and Light Prompt] When the probe touches live wires, the screen displays Hi with red backlit, and the buzzer emits a rapid beeping sound. The dual prompt system provides visual and auditory warnings, enhancing safety. 5、[Dual Use Screwdriver Head] The detachable dual use screwdriver head meets electrical testing and tightening requirements, allowing you to perform multiple tasks, convenient and space saving. Specification Item Type: Voltage Tester Material: ABS Battery: 1 x AAA battery (without) AC Voltage: 12-300V, 50/60Hz Measurement Error: 12-300V ±(5%+3) Package List 1 x Voltage Tester 1 x User Manual