How can I convert my headphones into bluetooth?

Bob has a pair of headphones that he loves and and older receiver. He would like to convert them to bluetooth. Leo says it can be done with a bluetooth transceiver. They come out of China and aren't very expensive. Rocketfish makes one. OroTech. You can easily get one for under $100 or even $50. You'll want one that plugs into the optical audio out to keep it digital for the least signal degradation. You'll also want the A2DP standard.