The Extech MA445 True RMS 400A AC/DC Clamp Meter is a hand‐held, 4000 count clamp meter. The MA445 offers 11 functions including AC/DC voltage, AC current, DC current, resistance, diode, continuity, capacitance, temperature, frequency, duty cycle, TRMS AC measurements, and Type K Thermocouple. In addition, the MA445 meters offer Display hold, MIN‐MAX, Relative mode, NCV (non‐contact voltage detection), and automatic power OFF.