Features: Non-contact and Pen Shaped Design, convenient to operate and carry.RED/GREEN Light LCD Display: can read the testing result clearly.Wide AC Voltage Range: can test voltage in 12V~1000V or 48V~1000V.2 Alarm Modes: sound or light alarm.Live Wire and Null Line Type: green light for neutral wire; red light for live wire.Signal Intensity Indication: the sound from slow to fast; the backlight from green to red; the bar graph from low to high.Adjustable sensitivity from low to hign.LED Flashlight: can use at night or in dark environments conveniently. Auto power off it’ll power off in 3 minutes if there’s no operation. Widely used in the investigation of industrial power and home line.