Keyboard: 88-Note, fully weighted, graded hammer action with adjustable touch sensitive keys Keyboard Sensitivity: 3 selectable response levels Polyphony: 256 voice Sound: High Definition German 9′ Concert Grand Piano Demo Songs: 50 General MIDI: No Effects: Reverb and Chorus. Metronome: No Recorder/Sequencer: No Sound System: 100W Watt 4-speaker, stereo sound system Audio Outs: Stereo left/right RCA line outs (for connecting to external amplification) Audio Ins: Stereo left/right RCA line ins (for connecting external sound sources) Mic In: (1) 1/4″ Hi-Z Input Headphones: (2) 1/4″ stereo headphone outs MIDI I/O: via USB USB: (1) port; “Plug and Play” USB functionality allows Audio and MIDI over USB for connecting to/from an external computer sequencer; no software driver needed Pedals: (3) built-in switch-type: sustain (w/ half-damper), sostenuto, soft Finishes: Ebony and Ivory polish Bench: Matching bench included Dimensions: 41.6″(H) x 56.4″ (W) x 16.6″ (D) 105.6 cm (H) x 143.3 cm (W) x 42.2 cm (D) Weight: 220.5 lb. / 100 kg Power: DC15V, 4A external power supply cup 1 Website : https://kurzweil.com/cup1/