DESC: Add an optional sustain pedal to your Casio keyboard for easier playability and more expressive possibilities.Works with the following models:CPS-7, CPS-85, CTK-481, CTK-483, CTK-485, CTK-491, CTK-495, CTK-496, CTK-496STAD, CTK-519, CTK-520L, CTK-531, CTK-54 , CTK-541, CTK-551, CTK-555L, CTK-560, CTK-560L, CTK-571, CTK-573, CTK-574, CTK-591, CTK-593ADMC, CTK-593STADMC, CTK-611, CTK-620L, CTK-631, CTK-650CSAD, CTK-651, CTK-671, CTK-691, CTK-691STAD, CTK-711EX, CTK-731, LK-40, LK-4 , LK-43, LK-43JC, LK-45, LK-50, LK-55, LK-90TV, LK-90TV Bundle, MZ-2000, WK-1300, WK-1350, WK-1600, WK-1630, WK-1800, WK-3000, WK-3000DX, and WK-3500.