Extech MA640 600A True RMS AC/DC Clamp Meters + NCVExtech MA640 600A True RMS Clamp Meters + NCV 600A True RMS Clamp Meters + NCV Integrated Non Contact Voltage Detector To quickly check for the presence of live wires before testing plus True RMS and 60A and 600A current ranges Key Features: True RMS for accurate readings of non sinusoidal waveforms Built in non contact Voltage detector with LED alert 1. 5" (40mm) jaw size for conductors up to 500MCM 6000 count, backlit LCD display Includes Multimeter