NSEN Replacement Audio Cable For Bose QuietComfort 2 QC 2 Headphone Compatible with QuietComfort 2 Acoustic Noise Cancelling headphones Lo signal-level switch optimizes sound performance from a variety of audio sources Contoured, angled connector fits iPod, DVD and other portable players Length about 1.7m, double as a standard audio cable Switch between calls and music with the press of a button