1、Non Contact Sensing: This electrical tester uses non contact sensing, NCV voltage detection, the probe tip of the test pen will be close to the AC voltage source, while the finger and the contact point are in reliable contact, the closer the distance from the power source, the more urgent the alarm is. 2、Flashlight Lighting: This line digital tester has flashlight lighting, lighting to assist in night time measurement work, to eliminate the risk of electric shock, for you to light up the dark environment in front of you can also see the screen value clearly, backlight is also clear. 3、Multifunctional: This non contact voltmeter is multifunctional and can be used for leakage switch testing, socket inspection to detect concealed problems, socket wiring inspection, AC voltage and DC voltage measurement, wiring breaks finding, wire conduction inspection and so on. 4、Backlight HD Display Screen: This non contact voltage tester features a backlight HD display screen, which is clear, easy to read, and very simple to use. 5、Wide Application: This pen type digital tester has a wide range of applications and can be used at home, circuit repair, electrical maintenance and so on.