Extech 38389 600A True RMS AC/DC Clamp MeterExtech 38389 AC and AC DC Clamp on Ammeters AC and AC DC Clamp on Ammeters Clamp on meters include models with Temperature and True RMS measurements With Peak Hold captures in rush currents Common Features: Key Features: Maximum AC current of 600A Measure AC Current, AC DC Voltage and Resistance Data Hold freezes data in display 1. 25" (33mm) circular jaw opening for large cables (350MCM) Audible Continuity beeper Auto power off Complete with test