I've got a cheap Chinese bluetooth audio kit so that a friend and I can listen to the same walkman while out and about, but the latency is trash so their listening is a good second and a half behind me. I came across this today, and was wondering what people think about it - https://www.kickstarter.com/projects/1943652747/natus-one-wireless-headphone-link-for-djs-and-home
Curious device. Not for my performance, though, I prefer to stay with cable. They never add interferences or latency ;-)