Advantage:                                                                  

1. The main frame adopts high quality aluminum with pipe wall 1.2mm. One key is folded.                                   

2. The front rod adopts a flat tube with a width of 4CM, and the piano painting process is more solid and beautiful, which changes the traditional way of round pipe.                                                                         

3. Interactive and fixed function, using pinball switch, traditional c-type card switch is used. Once the C card is lost, it is very troublesome.