At CES Urbanears displayed their new coming product called Slussen. A very simple accessory to extended your audio source among two devices, particularly to headphone and a DJ system. In the first quarter of 2013, a new Slussen iOS App is expected to arrive. The app further extends the scope of this audio experience by providing features such as audio mixing, crossfading and equalizing.

Source: http://www.urbanears.com/inside-urbanears/news/new-urbanears-product