Compatible with Casio CTK-2090 CTK-2400 CTK-4200 CTK-4400 CTK-2000 CTK-2080 CTK-2100 CTK-2200 CTK-2300 CTK-3000 CTK-3200 CTK-451 CTK-471 CTK-481 CTK-710 CTK-720 CTK-800 CTK-810 CTK-900 Keyboard. HQRP Sustain Pedal is suitable for all electronic keyboards synthesizers tone modules or drum machines with 1/4 phone jack sustain-pedal input. The pedal is made in piano-style and has a specially designed lower rubber part allowing the pedal to stay in place while you play. This pedal can also be used as FS controller. Disclaimer: This is not an Original Equipment Manufacturer (OEM) product HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility.