Extech MA63 True RMS 60A AC/DC Clamp Meter with NCV True RMS for accurate readings of noisy, distorted or non-sinusoidal waveforms AC/DC Current and DC Zero function Compact 0.7" (17mm) jaw size allows measurements in tight locations Variable Frequency Control (VFC): Low pass filter for accurate measurement of variable frequency drive signals Built-in Non-Contact Voltage (NCV) detector