Sony SRS-NS7 Help Manual page 59

Note
The (play/call) button on the neckband speaker does not work.
Watching a video on a non-BRAVIA XR™ TV while listening to its audio via headphones may cause unsynchronized video and
audio.
Related Topic
Connecting the transmitter and a TV
5-030-430-11(1) Copyright 2021 Sony Corporation
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