The wireless reference

Sound:
The headset sounds fantastic - better than the products of Sony and Bose beats and almost as good as cable headphones in this price range.
The switchable bass and surround modes I do not use, because they sound too artificial to me, sufficient bass has the headphones too.
The only problem is the technology-related echo effect when you hear the same about speakers and headphones, through the digital conversion, the two signals are minimal time lag,

Signal:
If you are in the same room as the transmitter, there are no dropouts, interference by WLAN is not detected.
The range is high, the specified maximum range is only achieved with visual contact.

Batteries:
The headset is powered by two AAA batteries (one on each side).
Again, there is no problem - when you hang up the phone when not in use on the stand, he is always ready for use.

Comfort:
The headset fits snugly but not unpleasant.
The controls on the page are difficult to distinguish, if you have the headphones on, but I need it rarely.

CONCLUSION:
Sennheiser manufactures again the wireless reference. A better ratio of price and performance can be found nowhere else.