Pioneer DDJ-SR Serato DJ Controller SERATO DJ CONTROLLER - 2 channel, 4 deck 2-channel performance DJ controller/mixer for Serato DJ&reg; software. 8 velocity sensitive rubber &quot;performance pads&quot; per deck provide HOT CUE, ROLL, SLICER and SAMPLER functions PAD PLUS transforms the four functions of the performance pads into dual functions such as HOT CUE ROLL, TRANS, COMBO FX and SAMPLER ROLL Large jog wheels for precise scratching and mixing capabilities