Kathy bought radios to fit our helmets so we can talk to each other a lot easier while we're riding. Between her profound hearing loss and the wind noise in my hearing aids, every conversation includes a lot of, "What?" We had to futz around with these a lot to get them to work right and fit comfortably in our helmets but, once done, they're working out pretty well so far. It's nice to be able to call out hazards and such and do so clearly the first time. On the other hand, during long climbs I'm listening to a combination obscene phone call-bad phone sex from Kathy.