Sony YY7854E Help Manual page 65

While a portable audio device is connected to the AUDIO IN jack and music playback is in progress, operations on the speaker,
for example, to pause, to skip to the beginning of the next track, and to skip to the beginning of the current track are disabled.
Do not use the AUDIO IN jack in places where the speaker is likely to have water splashed on it. The supplied AC power cord
(mains lead) as well as the jacks and ports (AC IN/USB/AUDIO IN/OPTICAL IN/MIC/GUITAR) behind the cap are not designed
for water resistant.
Be sure to close the cap completely after disconnecting the audio cable from the speaker.
The cap plays a very important role in maintenance of the water resistant performance.
Related Topic
Auto Standby (power saving) function
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