This is pretty cool... My buddy Tim and I were talking and I was telling him that a few years back I remembered a reference to wireless headphones from Radio shack. Well, he went down and checked to see if they have anything of the sort. Well, they do. They are made by Auvio and sell for about $75. He got to talking to the fella that worked there about a transmitter, because all he saw was the big bulky one for in-home use. He showed him one that is made to plug into an MP3 player that is about the size of a zippo lighter. All he had to do was buy the 1/4 adapter and plugged it in to the back of the E-trac. It sticks out about 1 1/2, but not bad at all. Radioshack gives a replacement if it should break too! I got to try them out today and I gotta say that it is pretty sweet! The headphones sound great and are quite comfortable. Only issue I might have, is that they may only transmit in one frequency and I don't know if I could hunt within 30 ft of him if we were both to use them. Either way it works great and looks pretty sweet too!