Headphones for TV are tuned for the best possible speech intelligibility by placing the speaker right next to your ear. Some of the best sounding and most durable options in the wireless field come from Sennheiser, which use Kleer wireless technology, as well as the more conventional RF (Radio Frequency) signal.
Simply connect the headphone base station to your TV or cable/satellite box, usually via RCA cables (red and white). If your TV only has an optical (or Toslink) connection, the higher end Sennheiser units (RS 175, 185, 195) have a digital/optical input built in for the easiest solution. Once connected, the TV speakers will be adjustable via normal controls, while the headphone listener will use the volume control on the headphones. The wireless headphone base station can also be plugged directly into the headphone jack on your TV, although sound quality can be poorer and will disable the TV speakers.
For an in-depth discussion of wireless headphones for TV, read our blog post Finding the Best TV Headphones.