Sony SRS-NS7 Help Manual page 23

If there is not a checkmark (green) on [SRS-NS7 Stereo], proceed to step
If [SRS-NS7 Stereo] does not appear, right-click on the [Sound] screen, and select [Show Disabled Devices]
from the menu that appears. Then proceed to step
7.
Right-click on [SRS-NS7 Stereo], and select [Connect] from the menu that appears.
When the neckband speaker is connected, a checkmark will appear on [SRS-NS7 Stereo] on the [Sound]
screen. Proceed to step .
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-7.