The Sennheiser MB 660's are an interesting headphone. Sennheiser's new MB 660 UC wireless headset is a great combination of work and play.hey are made for the office but can also can be used away from work, to take on a trip or to enjoy your favorite music at home.
Great noise cancelling; very good sound quality; very secure fit; well built
People I called sometimes claimed that I sounded as if I was in a box; A little on the expensive side