This assistive listening device reduces background noise.

2.4 GHz.
5 individual hearing profiles to optimize TV sound and music
Crystal clear dialog with Speech Intelligibility Button
Large and convenient volume control
Simple switching between 2 audio sources
Turns off and on automatically

From the Sennheiser website:
"The Set 860 not only enables you to set the volume to your taste without bothering anyone, it also allows you to tailor the audio signal itself to your personal needs.

As we get older, it becomes more difficult for our ears to pick up sounds and voices. But when we turn up the TV volume, we often disturb others – our partners, our neighbors. The Sennheiser Set 860 solves this dilemma. It not only enables you to set the volume to your taste without bothering anyone, it also allows you to tailor the audio signal itself to your personal needs. Thus, you may even find you can turn the volume down a bit and still enjoy your TV sound in new clarity and crispness."