Sony SRS-X33 Help Manual page 68

flashes in white to indicate the BLUETOOTH status. Absence of sound from the BLUETOOTH device does not
indicate any trouble with the speaker.
If the BLUETOOTH connection is active, you can use the hands-free function while listening to music of a portable
audio device, etc. that is connected to the speaker's AUDIO IN jack.
Related Topic
Connecting to a portable audio device, etc.
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