Upscale audio-visual equipment retailers Bang & Olufsen have unveiled their holiday collection for 2011 with a special emphasis on accessories for mobile device owners. Items include an iPhone-compatible hands-free stereo headset that can also work with other smartphones, a remake of the company's famous "Form 2" headphones, a speaker dock designed for iOS devices, a plug-and-play, multi-input digital music player and two models of slim, flatscreen HDTVs.