Ansuz Sortz USB Supreme (used)

ANSUZ "SORTZ".

The effective Anti-Aerial noise-reduction system for your HI-FI.

These new SORTZ from Ansuz are used in unused input/output terminals on your components.
The effect of using these new innovative SORTZ is an audible reduction of noise that primarily comes from airborne radio-frequency noise.
The unused inputs/outputs act as antennas that pick up precisely this type of noise. The noise is eliminated through the use of proven Tesla coil technology and Anti-Aerial technology.
Ansuz SORTZ are available in the RCA, BNC, XLR, USB, and LAN versions.

link to Ansuz