BenQ Portable Series User Manual page 52

Disconnecting a Bluetooth speaker or headphones
To disconnect a Bluetooth speaker or headphone from the projector so that it no longer outputs the projector's audio:
1. Press the settings button on the remote control
2. Select Remotes & Accessorries.
3. Select the speaker or headphones you want to disconnect from the device list shown on screen.
4. Select Unpair.
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