The Privia PX-870 is the flagship of the world-renowned Privia digital piano line, designed to give you a true grand piano experience. With authentic piano sound and feel, a sleek modern design and the powerful new Sound Projection speaker system, the PX-870 is a brilliant instrument to inspire brilliant performances. PX870 Piano 88 keys, Tri-sensor Scaled Hammer Action Keyboard Ⅱ, Simulated ebony and ivory keys, 3 sensitivity levels, Tones Sound Source : AiR Morphing multi-dimensional Polyphony (maximum) : 256 19 Instrument Tones Simulator Hammer Response - (4 levels), String Resonance - (4 levels), Damper Resonance - (4 levels), Lid Simulator - (4 levels), Key Action Noise - (ON / OFF), Damper Noise - (ON / OFF) Digital Effects Hall Simulator / Reverb - 4 (Hall Simulator), Chorus - 4, Brilliance - (-3 ~ 0 ~ 3), DSP - (Preset for some tones) Songs Concert Play - 10 songs, Controller - Start / Stop, Mode - Listen / Lesson / Play, Music Library - 60 Songs, Song Expansion (User Songs) - 10 songs (max.) Up to approximately 90 KB / song Additional Functions Sound Projection System, Headphone Mode, Volume Sync EQ, Connection to App, Lesson Function - Part ON / OFF, Lesson Part Select - Right hand, Left hand, MIDI Recorder - 2 tracks, 1 song, Approximate Data Capacity - Approximately 5,000 notes total, Audio Recorder / Playback - Max. 99 songs, approximately 25 min/song (44.1 kHz WAV format), Duet Mode, Octave Shift, Metronome - 0 to 9 beats; tempo range : 20 to 255, Pedals - 3 built-in pedals (damper, soft, sostenuto) Transpose button 2 octaves (-12 semitones ~ 0 ~ +12 semitones) Adjustment control A4 = 415.5 Hz ~ 440.0 Hz ~ 465.9 Hz Number of Preset Temperaments 17 Other : ・GRAND PIANO button ・ELEC PIANO button ・Slide-type keyboard cover ・Auto Power Off: Turns off after approx. 4 hours of inactivity (default settings) Connectivity and Storage PHONES/OUTPUT, Connector for 3-Pedal Unit, LINE OUT, USB TO HOST, USB TO DEVICE Speakers Size 4.72" x 2 + 1.57" x 2 Speakers System 2-Way, 4-Speaker Amplifiers 20 W + 20 W Dimensions 55.08" x 11.77" x 31.54 Weight 74.08 lbs Accessories included AC adapter, desk