There's the boring way, the easy way and the awesome way. Boring way: Buy a usb radio transmitter for a few dollars. Buy a tiny radio. Integrate into headphones. Build and add a CMOY headphone amp if you want better volume control. Total work: 30 minutes. Easy way: There's a chip that does this for you. It is 6$: http://www.semiconductorstore.com/pdf/newsite/nordic/nRF24Z1.pdf Awesome way: Get a radio licence. Give your wireless headphones a 1000 meter range using only analog electronics. Bonus points if you use vacuum tubes. More bonus points if you build your own vacuum tubes.