Yamaha P-121 BK, Stage Piano, Graded Hammer standard keyboard (GHS) with 73 keys, Pure CF Sound Engine with 24 tones, Max. polyphony: 192 voices, Dual, split and duo function, Two-track recording (one song), 20 Rhythms - drums + bass, Intelligent acoustic control, 21 Demo songs, 50 Piano songs, Reverb/Chorus effect, damper resonance, stereo sustain samples, key-off samples, string resonance, Midi via USB for connection to computer, iOS or Android devices, Built-in metronome, Tempo/transpose and tuning adjustable, Integrated loudspeakers: 2x 7 W output power, Line output stereo 6.3 mm jack (L/R), 2x Headphone output 6.3 mm stereo, Sustain pedal input, Dimensions: 1114 x 295 x 166 mm, Weight: 10 kg, Colour: Black, Includes power supply, Free app ""Smart Pianist "" for iPhone/iPad downloadable (additional connection cable required, not included)