i picked up this little guy for about 30 bucks on eBay. Bluetooth's to your phone (android or iPhone) and works great!
i use headphones plugged in to my phone, so this is a perfect way to control without a box glued to the side of your helmet.
(http://i575.photobucket.com/albums/ss197/Ducman82/Ducati/IMG_4319_zpspiilhzkg.jpg) (http://s575.photobucket.com/user/Ducman82/media/Ducati/IMG_4319_zpspiilhzkg.jpg.html)
(http://i575.photobucket.com/albums/ss197/Ducman82/Ducati/IMG_4320_zpsgydxan6d.jpg) (http://s575.photobucket.com/user/Ducman82/media/Ducati/IMG_4320_zpsgydxan6d.jpg.html)
(http://i575.photobucket.com/albums/ss197/Ducman82/Ducati/IMG_4321_zpssye6ksws.jpg) (http://s575.photobucket.com/user/Ducman82/media/Ducati/IMG_4321_zpssye6ksws.jpg.html)
But when you talk though the mic on your earphones/mic doesn't the other caller hear a lot of wind/road noise? Or do you just use it for GPS, music and camera control?
i have yet to use it to calls. Mostly for music and Gps.