The Amprobe CT600 is for use with multimeters, oscilloscopes, power recorders or any instrument with AC and DC millivolt input. AC or DC Current measurement up to 600A. It measures on two ranges of 100A and 600A (millivolt output respectively 10mV and 1mV per Amp). The wide frequency response is 40-400Hz and the device has a maximum jaw opening of 1.33″. It includes an overload protection up to 800A and also features a power on and low battery indicator.