1. Quick start guide, Windows USB DAC driver download link

Quick start guide download link: Click here
FiiO USB DAC driver download(For Windows computer):
It is recommended to use the v5.30 version. And if you are using Win7 computer, please use the v4.47 version.
v4.47.0 version: Click here (For Win7/8)
v5.30.0 version: Click here (For Win 10/11, not for Win7/8/XP)