Satellite Direct Tv

How do I plug my headphones into my TV and Computer ?

I have to go over to TV and take out headphone jack every time I want to plug in to my PC audio and listen to internet radio. Is there an adapter or cord to listen to both audio output sources and switch between both as and when required ??
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Here’s one.
It’s only 6 inches though. You can extend them.

DUAL SIM TV PDA MOBILE PHONE BC ITV CHANEL 4