The Extech MA1500 is a 1500A True RMS AC/DC Clamp Meter. 2.0 in. (52mm) jaw size for conductors up to 500MCM with True RMS for accurate readings of non-sinusoidal waveforms. Additional features include: Relative Mode for Capacitance Zero and Offset Adjustment, Data Hold, Peak Hold, MIN/MAX, Auto Power Off, and Inrush function to capture transients during motor startup.