Excellent keyboard with 61-note velocity sensitive keys with 48 note polyphony for creating rich layers,over 750 high quality voices, 48 note polyphony,Assignable real-time controllers, DSP and pitch bend,80 minutes of USB audio recording capability,Excellent connectivity for use with computers, iPads and more,Built in arpeggio function,Built in 12 watt speaker system with bass reflex design.