The most important improvement is the touch sensitive keys function switched by long pressing transpose+ button.
Additional features including protection function, MIC function, MP3 function, recording function, drum kit and chord will provide better playing experience..Features: Waterproof carrying case is convenient for storing and carrying keyboardCan be connect to sustain pedal to meet certain needs of performanceSpecification: Keyboard Material: ABS, Alum In addition, external sound will present louder sound than built-in one which enhances outstanding acoustics. Description: The upgraded 61-key digital piano keyboard with portable carrying case will be a perfect musical instrument whether for beginners or intermediate users.