Hercules DJ Control MP3 E2 Ultra-portable USB DJ controller is powered by your PC or laptop, with no power supply needed Mix tunes from your favorite MP3/WMA files and Audio CDs; record and share your mix with friends Two separate decks, each with vinyl-style jog wheel, pitch/effects controls, volume fader, and three-band EQ Automation features include cue point detection, auto-synchronization, automatic looping Add Flanger, Beatgrid, FlippinDouble, and Backspin effects; along with Baby, Tear, Forward/Backward, and "Pass-Pass" scratch effects