M-Audio SP-2 Universal Sustain Pedal with Piano Style Action for MIDI Keyboards, Digital Pianos and More

Natural feel, perfect response — Universal sustain pedal with chrome-plated foot pedal for a natural, realistic pedal effect
Universally compatible — The design with a conveniently attached polarity switch ensures compatibility with all electronic keyboards
Robust and reliable — Premium construction with robust, robust mechanism for uncompromising reliability
Made for on the go — The lightweight, ultra-compact design provides the necessary grip in classic piano style in portable space
Performance oriented design — Specially designed rubber pads on the bottom of the pedals ensure a firm grip on the floor and stay in place while playing
EFFORTLESS CONNECTIVITY — Includes 6-foot cable with 1/4-inch female connector for connecting to virtually any MIDI keyboard, stage piano, or sound module with a 1/4-inch sustain pedal input
The SP-2 has a polarity switch on the bottom. When this switch is turned on, the polarity of the pedal itself is reversed. This switch ensures that all keyboards and digital pianos are compatible. The customer most likely failed to toggle this switch before submitting this complaint.
SP-2 features a ¼ inch jack cable that is the industry standard for sustain pedals on virtually all keyboards and electric pianos worldwide.