I ride a '05 Honda Goldwing, I have matching helmets with intercom and sound system. I have been checking out both the Garmin zumo 550 and zumo 660. I know that both have blue tooth technology.Can either of these be used with by existing sound system so I may hear commands through my helmets? In reply to: "Garmin Zumo 660 built to guide bikers"
February 15, 2009