Pen type non-contact multimeter can automatically identify AC voltage, resistance, on off, very flexible, useful and practical. Professional Voltage Tester: The rechargeable multimeter can be used as a professional non-contact voltage tester. The sensitivity of the AC voltage tester is adjustable. Just place the tip near a terminal strip, outlet, or supply cord. When the tip glows red and the pen beeps, you know there's voltage present. Smart Mode: This multimeter supports auto mode and manual mode, it can automatically measure AC and D-C voltage, resistance, and continuity with the best resolution. All of these functions' measurements can be done manually as well. Red and Green Backlight: The digital multimeter has a high-resolution intelligent LCD display with red and green backlight, which greatly improves the reading experience. Versatile Pen TypeThe pen type multimeter can identify ac voltage, d-c voltage, resistance, and on/off, making it flexible and practical for confident usage. Easy to Use: Insert the red test lead into the "INPUT" terminal, black test lead into the "COM" terminal. The multimeter is capable of testing AC and D-C voltage, capacitance, resistance, diode and so on. Battery and Display: Built in 3.7V lithium battery, capacity 400mAh, and LCD screen, the maximum display is 1999 digits. The sampling rate is about 3 times per second, and the machine automatically shut down after 15 minutes without operation. Packaging list: 1 main unit + 1 bilingual instruction manual + 1 stylus pen + 1 charging cable + 1 3.7T 400nAh built-in lithium battery + 1 packaging box + 1 tool kit (high configuration)