Sony HT-CT800 Operating Instructions Manual page 12

 BLUETOOTH RX/TX (BLUETOOTH
receiver/transmitter) (page 36)
 AUDIO* (page 47)
* The AUDIO, , and  + buttons have a
tactile dot. Use it as a guide during
operation.
**When watching HDR signal and certain
4K format video, the OPTIONS and
DISPLAY buttons do not work and the
On-Screen Display (OSD) of the system is
not displayed. For details about the 4K
video format, see "Supported HDMI
Video Formats" (page 75).
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