The CP4020 is a 60 Amp current probe with a bandwidth of 100 KHz.Specification Bandwidth 100 KHz Maximum continuous current 20 Arms Peak current 60 A Switching ratio 50 mV/A, 2 mV/A DC measurement accuracy +/- 2% (50 mV/A) ( 0.4 – 10 Apk) +/- 2% (5 mV/A) (1A – 60 Apk) Power 9V battery