The Sennheiser RS160.

1) The TX160 RF transmitter base is small & compact. Can easily fit behind TV.
2) You can have up to 4 of the HDR160 headphones paired to it. Sound quality is good and it's a closed headphone design, so keeps sound isolated.
3) Headphones plug into a charger. The Sennheiser factory setup is with a detachable 2way power splitter for the headphones & RF base. You can order a 2nd power supply (or any 5V supply w/4mm plug) to power RF base separate.

Cons:
1) Uses 2.4GHz channels, so need to have clear bands. If this is in an intensely RF congested area, may have problems.
2) If you do want to have more than 1 headphone listening at the same time, user has to have access to the RF base station. And a series of button pushes has to happen.

[Link: en-us.sennheiser.com]