Hantek CC-65 AC/DC Multimeter Current Clamp Meter with BNC Connector 20KHz/400Hz Bandwidth 1mV/10mA CC650 Oscilloscope Features: AC/DC frequency range: Up to 400Hz Effective Measurement Range: 20mA to 650A DC It is a transducer which allows your multimeter to measure current data and enable your oscilloscope to measure the current waveforms. Its current transducer is composed by permalloy and hall element, which linearly transform the AC or DC current to AC or DC current voltage. And if connect to an oscilloscope by BNC type connector, you're able to observe the current waveforms; If connect to a multimeter by banana type connector, you can obtain the current data. Application: Power circuit measurement and malfunction analysis; Motor drive of frequency converter (or other electronics) measurement; Power electronics equipments measurement.