Using a cellphone during my daily commute by bicycle was an exercise in frustration. Using the handset for any length of time while moving is dangerous for numerous reasons (steering/balance, use of brakes, limited head mobility, etc.). The wind generated while riding made every other bluetooth headset I tried unusable- sometimes even when stopped, a light breeze was enough to cause problems for both a headset or even the handset's microphone.Then I found this little item. It has a boom mic that comes down near your mouth and the mic has a foam windsock on it. The speaker is in an ear-bud so you can hear it in the worst traffic noise- yet it doesn't block out necessary sounds from the environment.It works incredibly well. I've had conversations with people while I was going downhill at about 30mph and the people on the other end of the line didn't even know I was on a cellphone, much less using a headset while bicycling.The headset attaches to the helmet using a holder that's glued onto the helmet, the headset can be detached from the holder with a push of a lever. Charging is easy by use of it's standardized mini USB plug.The one thing I'm missing from this product is some sort of way to use it without my bicycle helmet- I'd love to be able to use it in my car since even the breeze from the air conditioner can mess up my standard headset.This headset works even better than advertised and I consider it to be superior to any other bluetooth headset I have ever used.