Kurzweil SP4-8, 88-Note Hammer Action Digital Stage Piano 88 Note Hammer Action Stage with PC3 technology 128 sounds 64 note polyphony 4 split layer zones 4 user-configurable zones with 10 customizable MIDI controllers PER zone Select signature KB3 organs, with all control parameters accessible via external MIDI KVA powered synth programs pulled from the PC3 Series sonic library