The black Yamaha LP-1 is a three-pedal unit designed to deliver piano-style sustain, sostenuto, and soft control for musicians playing Yamaha P-121, P-125, or P-515 digital pianos on stage, during lessons, or at home. Proper installation with your Yamaha P-121, P-125, or P-515 requires a separately available corresponding stand (L-121, L-125, or L-515).