Kurzweil SPS4-8 88 Key Stage Piano with Speakers 88-note hammer-weighted action with velocity sensitive adjustable keys and Kurzweil PC3 technology Built-in stereo speaker set and music rest 64 Voice Polyphony, dynamically allocated 128 factory presets taken from the acclaimed PC3 sound set, including select KB3 organs and KVA synths Dozens of complex effect chains taken from the PC3, with everything from concert hall reverbs to amplifier simulations and rotary effects