Product specification: Keyboard: 88-Note, fully weighted, hammer action with adjustable touch sensitive keys (Medeli 88RPTA) Display: 7-segment 3-digit LED Voice Type: Stereo PCM Polyphony: 68 voice Preset Programs: 128GM + Drum Kits Rhythms: 26 (11 Rhythms + 15 RhythmBanks) Play Mode: Splits, Layers, Dual Demo Songs: 1 General MIDI: Yes Transpose: Yes Tune: Yes Metronome: Yes Education Mode: Bayer, & Czerny 100, 30, 40, Sonatine Audio Power: 20W x 2, 8 Ohms Speaker: 6.5″ x 2 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) (1) 1/8″ stereo MP3 IN (1) 1/4″ MIC Input Headphones: (2) 1/4″ stereo headphone outs USB: (1) port; “Plug and Play” USB functionality allows MIDI over USB for connecting to/from an external computer sequencer; no software driver needed Pedals: (3) built-in switch-type sustain, sostenuto, soft Finish: Simulated Rosewood Bench: n/a Dimensions: 54.33″(W) x 19.57″ (D) x 34.13″ (H) 1380mm (W) x 497mm (D) x 867mm (H) Weight: 119lb. / 54kg Power: 90-250V AC free voltage external power supply; 24V 2.5A DC