M-Audio Prokeys Sono 61

61-note, semi-weighted, velocity-sensitive keyboard, Onboard, stereo-sampled emulation of a Steinway grand piano, Six other high-quality instruments: bright piano, electric piano, organ, clav, strings, choir

GM compatible with 128 onboard sounds, plus drums and percussion, Reverb and chorus effects, Layer mode, 40-note (maximum) polyphony, Assignable modulation wheel and voice volume control, Pitch bend wheel