I have been using the Duchinni D909 for the last week and must say am really pleased with the helmet. I have spent many ?'s on helmets, from Shoei to Shark and now Duchinni. The reason i chose the D909 was i liked the look of the helmet and the added bonus of Bluetooth connectivity. It was easy to set-up and connects to my HTC Desire without any issues on a daily basis. The helmet itself is made to a great standard and fits great. The bluetooh buttons are easy to use even with my bike gloves, but takes a bit getting use to functions. The options you have are volume up/down, answer call and fwd/rwd track. The volume comes from one speaker on the right ear with the mic near the front of the helmet by your mouth. The mic can be moved as it has velcro on the back. A charger is supplied and very easy to connect. The plan was to use the helmet mainly for playing music, but i have also received a few calls on the way home from work. I'm told by my callers that it offers noise cancellation, but have not tried it myself and so can not confirm it.