With Pink Floyd references like engraved triangles and rainbow coating background on the ear cups, and rainbow-colored stitching on the headband we gave this HD1 Wireless Special Edition a look all its own. The sound, of course, remained unchanged: signature high-class Sennheiser. With the high-definition aptX® codec carving out every aural nuance in finest detail, while the hybrid active NoiseGard™ attenuates ambient noise. Crystal clear conversations are guaranteed by the built-in VoiceMax microphone. This special edition is now exclusively available on Sennheiser’s Online Shops and at London’s Victoria and Albert Museum.