Features:Small and portable, easy to use and simple to operate.Accurately measure the effective value of various voltage waveforms in real time without distortion.Effectively eliminate the influence of lead resistance distributed capacitance or interference signal.The fixture unit is measured vertically through the center of the hole.The instrument is powered by AAA 1.5V battery (not included), uses a large LCD screen, and uses a boost power supply. Even at the edge of 2.3V low battery, the high brightness of the backlight and flashlight is guaranteed.The instrument backlight can be automatically turned on and off after 15 seconds.It's the perfect tool for labs, factories, radio hobbyists and homes.Function: AC-DC voltage, AC current (AC current 8202/AC-DC current 8203), resistance, capacitance, frequency, diode, buzzer, true RMS, NCV, square wave, TEMP, flashlight.