Good news!
The BRU5 version has been upgraded, allowing users to modify the default input method after startup to either Bluetooth or RCA.
Software download link
http://files.sure-electronics.com/download/BDM&BRU_PCUI.zip
Tips : If you are unable to download it, please copy and paste it into your browser for access.
User manual for BRU5
http://files.sure-electronics.com/download/BRU5_User_Manual_20240104.pdf