10-Function DMM with NCV plus Non-Contact AC Voltage Detector The Extech MN62-K True RMS Digital MultiMeter with FREE Voltage Detector measures AC/DC Voltage, AC/DC Current, Variable Frequency Voltage (VFC), Resistance, Capacitance, Frequency, Duty Cycle (AC only), Diode Test, and Continuity. The MN62-K includes a free built-in Non-contact Voltage Detector (NCV), and is ideal for troubleshooting appliances, electrical wiring, automotive repair and electronic devices.