Smart scaled hammer action keyboard with simulated ebony/ivory key textures 88 full-size fully weighted keys touch sensitivity (5 types, off) sound: multi-dimensional morphing air sound source 192-note polyphony 18 instrument sounds (5 acoustic pianos) modes: dual (layer), split (bass only) 2-track midi recorder 60 built-in songs (+ 10 user songs), part on/off: l, r acoustic simulator (adjustable): string/damper/key off resonance, damper noise, key on/off action noise (4 levels, off), hammer response (non-adjustable) metronome, transpose, master tuning 17 temperament options speakers: 8w + 8w (two 16cm x 8cm oval speakers) connections: usb to host, bluetooth 5.0 (audio only), headphone jacks (2), sustain pedal jack, line out (r, l/mono), audio in (stereo mini jack) w x d x h: 52” x 9.1” x 4” (132.2 x 23.2 x 10.2 cm) 24.7 lbs (11.2 kg)