Beats by Dre introduces a special-edition pair of Mixr headphones, that will come  in a luxurious white and rose gold colorwayand and will be available exclusively at the high-end UK-based department store.  The Mixr on-ear headphones features industrial strength sound courtesy of 40mm drivers, delivering deep bass notes and a low frequency range with a custom diaphragm for smooth mids and highs, along with a design enabling a full 270-degree pivot radius, meaning the switch from one ear to two is both easy and fast. The limited edition Mixr headphones in rose gold are available now through Selfridges’ online store.