Non-Contact Safety Voltage Testercan 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 differentiates between zero line and live line, also suitable for detecting line break in 110V and 220V power system. 9 levels of sensitivity 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 flashlightH/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 Shut-off and Handheld Stylus Hook After about 3 minutes without operation or signal detection, the voltage detector will automatically shut off to extend battery life and save energy. With the convenient portable pencil hook, you can easily remove and carry it. Product NCV Tester with Adjustable SensitivityPortable Pencil Hook Design comfortable and friendly. For its weight or overall design, this pen is as easy to carry around as a normal pen. The design of the Pencil holder allows you to carry the pen anywhere. You can take it in your pocket after use without taking up much space AC1 Voltage Tester Intelligent power consumption reminder Auto power off - After about 3 minutes without operation or signal detection, the voltage detector will automatically shut down to save electricity. This can extend the battery life. Battery status indicator - It is helpful to use the pen safely. If the pen does not work not well, you will be prompted on the LCD screen. Replace the battery in time to avoid using the pen when there is no power.