The Extech MA443 True RMS 400A A/C Clamp Meter is a hand‐held, 4000 count clamp meter. The MA443 offers 10 functions including resistance, diode, continuity, capacitance, temperature, frequency, duty cycle, and TRMS AC measurements and Type K Thermocouple. In addition, this meter offers Display hold, MIN‐MAX, Relative mode, NCV (non‐contact voltage detection), and automatic power OFF.