Pioneer Portable 2 Channel Controller For Serato Dj - UsedVery lightly used portable 2 channel DJ controller for Serato DJ. Pioneers DDJ SR 2 channel DJ controller is designed for use with Serato DJ software. The smaller and more compact DDJ SR inherits many of the same functions and controls of the larger DDJ SX introduced in 2012, offering large aluminum jog wheels, integrated performance pads, and a new PAD PLUS feature that adds four additional audio effects to the performance pads..