61 Keys Roll Up Piano With Horn Adult Children Silicone Electronic Keyboard Piano Enlightenment 1.61Key (C2~C7) standard tone 5 tone group +1 key.2.128 kinds of tone, 100 beats, 40 Option Bonding.3.LCD liquid crystal display.4 master volume control keys, beat, control keys.5 mode selection keys (tone, beat)6 recording, programming, play function.7 single finger and multi finger and Hyun Hyun.8 demonstration jukebox.9 pairs of keyboard functions.10 start / stop, sync, insert function keys.Out 11.MIDI function. Can be directly connected to the computer, playing the use of MIDI software,.MIDI OUT connection line is required to edit music12.2 step teaching function.13 internal loudspeaker: can connect external audio / headset14 dimensions: 61 keys: control box (body): 230 (W) x 95 (H) x 31 (D) mmKey: 880 (W) x 168 (H) x 6 (D) mm16 power supply: 4 AA batteries (can play 15 hours), the other is the external power supply. Power supply: DC6V (cell AA1.5V X 4) output power: 500MWThis instrument can be used in 5 or 4 battery or 6V DC power supply (Note: the two do not use the same time.)