Keyboard type 88-Key Hammer-action Piano Product Size 130.5*26*11.5cm (49.6*10*4.5 inch) Tones 238 Split Timbre support Range A2 ~ C5 Metronomes 6 Type; 30-280 Beat Speed Product Weight 23 kg (50.7 lb) Max Polyphony 128 Rhythms 200 Demo Songs 100 USB - MP3 playback. Wireless Connection Bluetooth Audio & Bluetooth MIDI Speaker Output Power 15W * 2Power Socket DC 12V 3AHeadphone Socket 3.5mm*2