Sony SRS-BTS50, Help Manual, Page: 117 / 120

Polarity of the plug
Plug the AC adaptor into a nearby wall outlet (mains). In the case of a problem,
unplug it from the wall outlet (mains) immediately.
Do not install the AC adaptor in a confined space, such as a bookcase or built-in
cabinet.
To reduce the risk of fire or electric shock, do not expose the AC adaptor to
dripping or splashing, and do not place objects filled with liquids, such as vases,
on the AC adaptor.
On placement
Do not set the speaker in an inclined position.
Do not leave the system in a location near heat sources, or in a place subject to
direct sunlight, excessive dust, moisture, rain or mechanical shock.
When playing the system at loud volume, the system may move due to vibration,
depending on where the system is placed.
Check that the system is placed where it will not fall down due to vibration.
On operation
Do not insert any small objects, etc., into the jacks or ventilation hole on the rear
of the system. The system may short out or malfunction.
On cleaning
117