I received a pair of wireless Sony MDR-RF810R headphones for my christmas. I would like to be able to use the headphones will I am on the go (bus,library etc) without needing a the specific radio transmitter that requires a power supply. Is there another type of radio transmitter I could use that I would be able to plug into the headphone jack of my phone/mp3 player.
Any help would be greatly appreciated.
Thanks, Lewis.
