Hand roll piano, with the multi-functional LED digital display tube, features simple operation, high cost-effectiveness and easy portability. This piano is also integrated into three functions, namely MP3 player, repeater and learning machine. It is the perfect combination of music, English education and entertainment. The piano uses the world's newest 24 bit microprocessors, which endow it more powerful function and more mellow and standard tone in contrast with the traditional 8 bit microprocessors. This piano has 129 excellent tones (including 128 kinds of normal tones and one set keyboard percussion tone) and is equipped with 100 rhythms and 80 demos.