Studiologic SLP3-D Triple Pedal for Keyboards & Midi Controllers, Stereo Jack Connection Triple pedal with one stereo jack and a single cable Reliable, simplified connection to modern midi controllers and musical instruments 2 switch controls (left and center pedals) and 1 continuous control (right pedal) Perfect for pianists and keyboardists looking for reliable and complete musical expression Compatible with Studiologic SL88 Grand and SL88 Studio Midi Controllers