The MSOAK, compatible with the MaxiFlash VCMI included with the MSUltra and MS919, and the MP408 4-channel oscilloscope (sold separately), The current clamp measures a maximum current of 65A with a frequency up to 20 KHz. It works with jaws that open to allow clamping around an electrical conductor. And the 650A AC/DC current clamp measures a maximum current of 650A with a frequency up to 400 KHz. And the COP Probe can catch the ignition waveform of automobile engine easily.