Product specifications:<ul>
Keyboard model: 61 key (C2-C7) standard piano key
5 octave, 1 key
Tone: 128
Rhythm: 100
Demonstration songs: 21
Rated voltage: 6V DC (battery 2AA 1.5V x 4pcs)
Output: 500mW
Size: 49 key 
Control box: 102 x 184 x 33mm
Keyboard: 885 x 175 x 4.0mm</ul>
Product features:<ul>
The DoReMi roll-up piano is very portable to be rolled up in your hand bag for taking along
You can select the DoReMi roll-up piano 61 keys (4 octave, 1 key) for beginners, or the 88 keys (7 octave 1 key) for more advanced learners of piano</ul>
The DoReMi roll-up piano has many functions, the details as followed:<ul>
128 tone function (check tone list attachment)
100 rhythm options (check rhythm list attachment)
Add 001-100 control keyboard
21 demo songs (check demo song list attachment)
Midi out 16 output channel design</ul>
The DoReMi roll-up piano uses 4 double A 1.5V batteries which can last for up to 12-15 hours of playing time
You can also plug the piano into any electrical outlet with an adapter