Sennheiser RF listening System 

<p>Sennheiser RF listening System. </p><br /><p>Set 840 S is a RF stereo TV listening system and is especially suited for those who wear hearing aids. Easily connected to a TV, hi-fi system or radio, Set 840 S produces excellent sound, delivered directly to your ears.</p><br /><p>The sound is transmitted from the receiver to the hearing aid via wireless induction over the induction loop that is included in the scope of delivery. Alternatively, you can connect headphones or induction couplers to the lightweight clip-on receiver.</p>