The upgraded 61-key digital piano keyboard with portable carrying case will be a perfect musical instrument whether for beginners or intermediate users. The most important improvement is the knocking force key function switch by long pressing transpose+ button. And comparable with PVC panel, the silicon panel will effectively avoid hidden malfunction. In addition, external sound will present louder sound than built-in one which enhances outstanding acoustics. Teaching function helps user to learn demos easily and bluetooth function is convenient for 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.