I have one, it’s capable of a wired connection also, the usb profile is shown on the screenshot I shared above.
iFi mention this in their blurb…
“Further flexibility is provided by the USB-C charging port, which doubles as an audio input enabling USB connection from source devices that don’t offer Bluetooth connectivity. Hi-res PCM audio data up to24-bit/96kHz is supported when the GO blu is connected in this way”
No idea how it sounds connected via USB I didn’t buy it for that, using LDAC and FIIO FH7 IEMs in ARC it’s incredible and tucks in a shirt pocket.