The Hercules MK4 is an all-in-one mixing deck that you can take on your travels. In addition to its USB port, the MK4 by Hercules has two stereo outputs for playing mixes to audiences and previewing the next track. Two stereo inputs are also available for hooking up a turntable or an MP3 player and including content stored on these devices in your mixes.  The compact and lightweight MK4 mixing deck is even equipped with a protective case and a shoulder strap for easy carrying.