The upgraded 88-key digital piano keyboard with a portable carrying case will be a perfect musical instrument whether for beginners or intermediate users. The most important improvement is the dynamical adjustment by long-pressing transpose+ button. And comparable with the PVC panel the silicon panel will effectively avoid hidden malfunction. In addition the external sound will present louder sound than a built-in one which enhances outstanding acoustics. Teaching function helps the user to learn demos easily and Bluetooth function is convenient for the user to follow playing with music. Additional features including protection function MIC function MP3 function recording function drum kit and chord will provide better playing experience. 128 Rhythms ...