Non-Contact Voltage Tester: Safety Compliance The voltage tester can test voltage without touching. Contactless operation ensures safety, you don't have to worry about electric shock. During AC voltage test, it can automatically detect live wire/neutral wire. Which is specially designed for home safety testing voltage. Adjustable Sensitivity: Adjustable sensitivity ensures that the non-contact voltage tester measures more sensitive. Simply press the S button to easily change the sensitivity of the voltage tester. Standard mode (measuring range 48~1000V AC) and sensitivity mode (measuring range 12~1000V AC). During use, the NVC sensor of the probe automatically detects the voltage intensity and displays it on the LCD screen. Auto power off and screwdriver function: after about 5 minutes of operation Inactivity or signal detection, the voltage detector will automatically turn off to extend battery life and save power. Small, practical and equipped with a side screwdriver. This makes the non-contact AC voltage tester very suitable for your work, versatile and portable. Beep signal and low voltage indicator: When the battery voltage drops below 2.6V, the LED indicator flashes 3 times and the buzzer sounds, reminding you to replace the current tester battery. if an alternating voltage is present at the measuring point, the integrated LED flashes red and an acoustic signal sounds. LCD display and LED flashlight: the white LED flashlight has high brightness and a low energy consumption. The lighting and probe are combined to illuminate the working area, and the phase tester can also be used to measure in the dark.