Details: 1. Made with non -toxic and harmless environmental protection silicone, waterproof; 2. The power supply can be selected 3 AA batteries, or the AC power adapter can be used; 3. Products can be rolled and easy to carry. 4. Product size: Silicone keyboard: 71x12.5cm;plastic sound box: 17x10x2.5cm;Box size: 19.5 x16x7cm. At the same time, it has the excellent sound quality of the piano and the various functions and entertainment effects of the electronic piano. However, it is as thin as a dinner mat, and it is as small and light as a book. It can help many people to realize the music dreams that have long been stored in the heart anytime, anywhere. A. Keyboard: 49 key Standard keyboard. B. Sound color: 8 kinds of sound color. C. Demonstration song: 6 demonstration songs. D. Teaching function. 49-key Mini roll up Piano Toys. It is with excellent sound quality like Piano and multiple functions as electronic keyboard. But Hand Roll Piano is as thin as eat matsmall and light like a book. It can help you realize music dream anytime and anywhere. A. Standard 49 Simulation Keys. B.Tones: 8Tones (0 ~ 7tone control). C.Rhythm: 6 rhythms (0 ~ 5 rhythm accompaniment). D.Demo Songs: 6 Demo songs.