Sennheiser Set SET 820 Instruction Manual page 7

Connecting the transmitter (charging unit)
The rear of the transmitter is
fitted with two audio inputs:
A socket (LINE) for connection
to the audio output or the
headphone socket on your TV,
and a microphone socket (MIC).
Plug in one end of the connecting cable to the audio output or the
headphone socket on your TV, and the other end to the LINE socket on the
transmitter.
If your TV set is fitted with a SCART socket, use the supplied adapter.
If your TV does not have a headphone or SCART socket, you can use an
external microphone which is described in the section "Accessories".
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