61 Keys Portable Roll Up ectronic Soft Keyboard PianoProduct description: 1. 61Key (C2-C7) standard sound 5-tone group +1 button. 2. 128 sounds, 100 beats, 40 demo songs (Bonding Option). 3. LCD liquid crystal display. 4. Master volume control button, beat, control button. 5. Mode section button (timbre, beat). 6. Recording and playback functions. 7. Multi-finger and Hyun. 8. Demonstration singing. 9. Dual keyboard function. 10. Start/stop, sync. 11. MIDI Out function. It can be directly connected to a computer, played with MIDI software, and edited by music. 12. 2-step teaching function. 13. Internal speaker: External headphones / external audio. 14. Size: 61 keys: control box (body): 230 x 95 x 31mm, button: 880 x 168 x 6.0mm. 16. Power: 4 AA batteries (battery AA 1.5V X 4), can play for about 15 hours. Another external power supply, power supply: DC 6V, output power: 500W. Note: 1. MIDI OUT cable must be purchased by yoursf. 2. 4 AA batteries must be purchased by yoursf. 3. This piano can be powered by 4 AA batteries or DC 6V power supply (Note: Do not use both at the same time.)