Compatible with Williams Allegro / Legato / Encore / Etude Mk2 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.