Pacemaker - pocket dj
2008-2011
The Pacemaker DJ device could mix tracks, beat match, and crossfade, just like any pair of DJ decks. Impressive given its size. It even won an award for its bold design and was well-received by an active online community. Unfortunately for the Pacemaker, the newly released iPhone could do all the same things
Additional info:
Vice.com - An Ode to the Pacemaker, the Failed Portable DJ Device