@icedquinn@blob.cat Per fosi's official support page "The Bluetooth functionality cannot be disabled. However, you can try removing the antenna (if included) and covering the amplifier with a metal shell to shorten the connection distance. Also, please try turning off the amplifier, powering it back on, and then reconnecting your devices.
Some of our products feature a mode switch button. In the upgraded version, BT20A PRO and MC101, you can disconnect a previously connected Bluetooth device by long-pressing the volume button for 5 seconds."
https://support.fosiaudio.com/hc/en-us/articles/32526035096857-Turn-off-the-Bluetooth
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