FX SEL KNOB Compatible with: DDJ-1000, DDJ-1000SRT, DDJ-800, DJM-700-K, DJM-700-S, DJM-750-K, DJM-750-S, DJM-750MK2, DJM-850-K, DJM-850-S, DJM-900NXS, DJM-900NXS-M, DJM-900NXS-W, DJM-900SRT, XDJ-RX2