Greenlee CMI-200-C 2500-Amp Industrial Clamp Meter, Includes Certificate of Calibration True RMS for accurate measurement when harmonics are present High capacity 2500-Amp DC, 2100-Amp AC amperage measurement 600-Volt AC/DC voltage, frequency, and resistance measurements for maximum versatility Peak hold, min-max, relative offset and analog bar graph to help monitor power changes Includes certificate of calibration