Amazon.com: ENJOYPRO Sustain Pedal for Yamaha Keyboard, Piano Keyboard Pedal with Polarity Switch for Casio, MIDI, Roland Electronic Keyboards and Digital Pianos, 1/4 Inch Jack : Musical Instruments
File:Yamaha PSR-270 61-Key MIDI Portable Keyboard on stand with foot sustain pedal, soft case.jpg - Wikimedia Commons