1TROUBLESHOOTING AND ACCURACY: The pen type digital multimeter support AC DC voltage, millivolt, resistance measurement, voltage sensing, diode measurement, and on off measurement 2POWERFUL FUNCTIONS: The pen type AC DC voltage tester adopt non slip design, support neutral and live wire identification, automatic shutdown, data retention, and prevent burn protection, which is real and effective 3PORTABLE AND CONVENIENT: The pen type digital multimeter use a pen body design, small and convenient, easy to carry, one hand to hold, measurement worry free 4FLASHLIGHT LIGHTING AND DIGITAL DISPLAY: Voltmeter sensor pen equipped with flashlight lighting function, bring 24H lighting, fear of darkness; LCD digital backlight display, high definition backlight make reading clearer 5AUTOMATIC RECOGNITION: Pen type digital multimeter electrical tester support intelligent detection, automatic recognition, automatic measurement of AC and DC voltage, resistance, on and off buzzer