Non-contact safety voltage tester can be tested without physical contact. The buzzer and flashing light remind at the same time and increase the safety factor. Insulation operation ensures safety testing. Automatically differentiate between zero line and live line, also suitable for detecting line break in 110V and 220V power system. 9 sensitivity levels to choose from. The voltage range is 12-1000 VAC. During use, the probe's NVC sensor automatically detects the voltage intensity. The meter activates the corresponding signal strength indicator based on p. Low voltage display If the battery voltage is lower than approximately 2.6 V, the operation display flashes three times and the buzzer sounds and turns off automatically. Please replace the battery. LCD display and LED flashlight H/L display intensity, red is the highest intensity. The white LED flashlight has high brightness and low power consumption, which illuminates the work area in the dark. Light and probe are combined for easy measurement. Auto-off and portable pen hook After about 3 minutes without operation or signal detection, the voltage detector will automatically shut off to extend the time battery life and save power. With the convenient portable pencil hook, you can easily remove and carry it.