So I finally found a really good handlebar-mounted speaker to run my mp3 player through. I bought two of them and mounted one on the front of my bike and one on the back so my wife can also enjoy music while we're riding together. It's working very well, except for when she falls too far behind.
Now, with $125 in Amazon gift cards in my hand, I want to upgrade to a Blue-Tooth set-up that will let me mount the second speaker on HER handlebars and transmit the signal from my mp3 player to a receiver on her bike. That way, if she stays within 30 feet or so, she should be able to pick up the music right in her face.
Does anybody have any experience with this? And can you recommend a Blue-Tooth system to do the job? (Please do not bombard me with commentaries about how we shouldn't be listening to music when we are riding. Neither of us wants to wear earphones, as we find them dangerous and we prefer to be able to talk to each other while riding.)