Donner Dsp-003 Sustain Pedal, Universal Keyboard Piano Pedal For, Straight Functional Universal Sustain Pedal: Used as acoustic piano?s sustain pedal to prolong the sound. Includes 1.6 m(62.9 inches) cable with 1/4 inch jack, widely for MIDI keyboard, digital piano, electronic keyboard, synth, etc High Quality Classic Design: Sturdy ABS plastic cover with chrome foot pedal for long use. The honeycomb construction and selected premium spring offer stable, natural, and realistic pedal action. Unique trapezoid lines make it more classic and elegant Strong Compatibility: Scientifically located polarity switch, which can easily reverse polarity, is designed to work with various types of electronic keyboards Stable Anti-Slip Setting: Built-in small irons increase the weight, more grounded, and not easy to move. The bottom with 6 slip-resistant pads grips the floor to keep the pedal perfectly in place Humanized Design: Inner positioning column is built for preventing the pedal from scratching the base. The plug surface designed with texture increases friction for easily plugging in/out