MWC is not only the annual event for global communications companies, but also a place for many peripheral manufacturers to play their part. At the MWC2012 show, Sennheiser released two new head-mounted Bluetooth headsets, the MM550 and MM450-X. Both of these headphones are built for music enthusiasts who value sound quality, but they will differ in how they are worn. Senhai MM550 and MM450-X noise reduction Bluetooth headset Both the Sennheiser MM550 and MM450-X Bluetooth headsets feature a foldable design and good portability. Thanks to the latest NoiseGard 2.0 technology, both headphones can eliminate 90% of the ambient noise, and Apt-X file compression technology allows audio data to be transmitted four times faster than in the past. The two Bluetooth noise canceling headphones are expected to be available for sale in the middle and late March 2012, and the product price will be announced at that time.