Clarity A Division of Plantronics Inc. C120 ユーザーズマニュアル

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The C120™ TV Listener transmitter may be 
placed on top of a television or shelf. This 
product uses infrared light. This type of signal 
can be blocked by solid objects. Do not place 
objects in between the transmitter base and 
the headset receiver.

For the clearest signal, place the base at your 
viewing eye level or above. As illustrated in 
Fig.1, the clearest signal emitted from the 
base is in a straight line, directly in front of 
the base. The base must be clearly visible 
from your television viewing position.
It is important to follow the above guidelines 
to ensure communication between the base 
and headset.

Sunlight can cause interference with the pro-
duct and cause problems such as buzz, static, or 
hiss. As a result, this product cannot be placed 
in direct sunlight or be used outdoors.

The headset will only receive the signal in the 
same room where the base is located. The 
maximum operating distance is approximately 
38 feet, depending on environment.

 Multiple headsets may be used with a single 
base if they are set to the same frequency. 
However, if more than one base is being used 
at the same time, interference will occur.