I cannot find the app to download and I am receiving an Error 504.
The 504 error is a server-side gateway timeout, which usually means the UGREEN website is temporarily down or having connection issues. To resolve this…
Manuals+ Q&A
UGREEN CM390 Bluetooth Adapter User Guide — questions & answers
Read product questions and troubleshooting answers linked to UGREEN CM390 Bluetooth Adapter User Guide.