A question from a Friend.

A friend asked me to mod or build a set of wireless ear buds.
Example Picture

I thought this would be a really cool project to try.  Now since I haven't used wireless before I have to decide between bluetooth or RF Signal

•RF Signal is easier to set up but I have to test and experiment

•Bluetooth is stronger and more private but Need extra circuitry and software with more power

So I would love some useful advise