Wireless headphones compatible with TV or computer

I selling a wireless headphone set. It uses ~900MHz. The transmission station plugs either into any headphone jack on computers, MP3, or phones. Alternatively, it could also be plugged into the RCA connections of a TV. It is very lightly used (aka it was taken out of the box, left somewhere for a while and put back into the box). The model number is CWHP140 and it advertises a 30m distance of reception. I'm asking for $25.