The HD 2.30 is a compact, extremely lightweight pair of headphones that makes it easy to get the most out of portable devices. The premium mobile experience: Great Sennheiser sound, complete control over your music and phone calls. Tough enough for the street, yet extremely comfortable to wear. With the HD 2.30 we went for the all-in package. This means, you get much more then a pair of elegantly designed, lightweight yet robust, foldable headphones. For freedom of movement the HD 2.30 a detachable single-sided cable, which has a 3 button inline remote plus microphone.