@james141111 Im not sure why this needs to be specialist hardware, surely software could be written that just looks for a standard USB drive with a specific serial or key file on it to do exactly the same thing?
The BusKill software does not need specialized hardware. It works with with any standard USB drive.
The benefit of buying our cable is that it has a magnetic breakaway in the middle of the cable, but of course you can make your own. We have instructions for this here: