Your search for sennheiser set 840 returned the following:

Wireless TV listening system with in-ear headphones

In Stock

27 people say 

• transmits sound wirelessly from a TV or audio system
• RF wireless transmitter range: up to 100 feet
• selectable hearing settings include optimized speech intelligibility and treble emphasis

Extra headset for SET 840 TV wireless listening system for TV

In Stock

2 people say 

• receives sound from a Sennheiser SET 840 TV or SET 840 S wireless TV listening system
• RF wireless transmitter range: up to 100 feet
• built-in volume and balance controls allow individual settings for each headset

Hearing aid-compatible wireless TV listening system

In Stock

9 people say 

• transmits sound wirelessly from a TV or audio system to your hearing aid
• RF wireless transmitter range: up to 100 feet
• selectable hearing settings include optimized speech intelligibility and treble emphasis