Sennheiser Set 820 Instruction Manual page 24

Set 820
Thank you for choosing Sennheiser! Over 60 years of accumulated expertise
in the design and manufacture of high-quality audio equipment has made
Sennheiser a world leader in the field of audiology.
The Set 820 is an assistive listening system for your radio, TV, hi-fi system or
similar sound sources at the volume you choose. The transmitter has a range
of up to 100 ft which allows you to move around freely – without the
constrictions of cables. The system uses RF audio signals for sound
transmission.
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