The X2 may be used for listening to other audio sources, such as the output of
your TV, the output of your PC sound card, an Mp3 player, home theater system,
etc. In each case, simply connect the output of the audio device to the audio 
input jack on the base unit and set the level control for optimum listening 
volume.

As an example, here is how to connect the X2 base unit to the output of a home
theater system: In this case, the base unit audio input would be connected to
the stereo line output on the home theater receiver. In some systems, this 
would be the recording line output, typically used for a cassette recorder, 
while on other systems it would be a pre-amplifier line output. Refer to the
instructions included with your unit for details.

Step 1:
    Insert the mini plug into the Audio Input jack on the base unit and
    set the input level switch to Low.

Step 2:
    Insert the red and white male RCA plugs into the line outputs on the
    sound system.
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