The P-121 digital piano is a portable design which is perfect for practice and performance for beginner to professional players, it features 73-key Graded Hammer Standard (GHS) weighted Action, Pure CF Sound Engine, 24 voices, 20 rhythms, 10 pianist styles, 192-note polyphony, Damper Resonance, Sound Boost, 2 track / 1 song recording, USB to HOST connection (MIDI via. USB), AUX outputs, built in 7 watt x 2 amplifier, use an optional L-121 stand and LP-1 3-pedal unit.