Non-contact Non-contact Voltage Tester - Testing can be achieved without physical contact for its NCV Inductive probe operation.Insulation ensures test safety. LED Flashlight - one white LED Flashlight with high brightness helps illuminate the working space in dark. The illumination lamp and the probe are combined together, convenient for measuring. Auto off OFF - After about 5 minutes without any operation or signal detection, the detector will be closed automatically. Reset battery prompt and shutdown when battery voltage is lower than 2.6V. Adjustable sensitivity with dual range - detects standard and low voltage (12-100 0V AC / 48-1000V AC) For more sensitive and flexible measurements. Press the S key to adjust the sensitivity. Safe and convenient - audible and visual alarm always protect your safety. Convenient portable pencil hook helps you take it out easily.