The scope is also very interesting, my home is 4 floors and the walls are thick enough and yet I manage to capture far enough with.
It is indicated that the battery has a battery life of 12 hours, it is probably if you take one of at Sennheiser. I bought some batteries on the side which 1000mAh (600 Sennheiser) and I managed to hold 5 day (+ -10h / day) with a pair of batteries.
The case is very small, we can put it in a bag and carefree listening to music with. The access buttons are rather confusing at first but when you get into the habit, it's pretty easy in the end.
Given its price and sound quality, I advice! This is a very good helmet, he obviously replace my old Pioneer who also had a sound quality very interesting.