I know a bunch of us have these and the weak link is the bracket that mounts the unit to the helmet. They seem to break with some frequencey. I always carry 2 extras in my tank bag...they've come in handy a couple of times. For others!!! Anyway, I have ordered a few just to have. If anyone is interested I have 3 that I'd sell for $7.00 each. I'm not trying to make any money just trying to let folks know I have them. (Chatterbox was out of them for a long time...just got them back in stock at $4.99, plus $10.41 shipping.)