We've got a wireless Tandem-Com that we use occasionally. When we use it, I love it. Makes the stoker much more chatty because you can hear so much better. We only use it when we ride alone, so that seems to limit it's use for us quite a bit. Trying talk to other cyclists get's kinda loud for the other person. Another factor is the speed that the rechargeable batteries drain. I'm guessing we can only get about 4 hours out of them.