It works too well. 2ln had it in Cripple, last year. Led a bunch of us all over the damn place while he was yapping on the cell phone!!!

It was brand new then. Guys have to play with new toys!
All kidding aside it does work pretty well. It's actually not at all fancy or over done. Just very effective to its purpose.
It'll make a bluetooth connection to a phone or other bluetooth device (including another N-Com equipped helmet). It and my Razr phone get along fine.
Aside from the bluetooth connectivity it has two wired connection as well. One for a wired intercom to a passenger wearing the same lid. The other is an aux in for use with any other audio source. The third line coming out of the lid is the power connector for the battery charger.
It's battery will stay up for normal use all day. It is another charger to take on road trips. But when you're already hauling one for the camera battery and the cell phone and sometimes the notebook PC what's one more.
You can hear the calls inside the lid just fine. You will need to fully close the face shield when you receive a call. Too much noise otherwise. I've never had anyone guess I was on the bike when taking a call while riding.
Voice command functions of your phone work through it ok as well. It's a one button tap to answer or initiate a call.