A hifimediy usb isolator for removing ground loop noise from audio circuits involving a usb connection. It works but I had to replace it as I needed one with a higher capacity. I think the details of this one can be found at hifimediy.com/product/usb-isolator/
Let me know if any questions I know this is a weird offer.
Hifimediy usb isolator (Sale M33)
This offer has been gifted to someone and is no longer available.