1、Built in Lithium Battery: The portable electronic piano keyboard has a built in large capacity rechargeable lithium battery, which is convenient for outdoor playing. 2、Teaching Function: The piano keyboard is equipped with 3 teaching modes with a variety of function keys, which is very suitable for beginners to learn. 3、Multiple Interfaces: Built in dual speakers and multifunctional interfaces, microphone, audio input function, can also be connected to a mobile phone for playback. 4、Recording and Playback: 37 key piano has recording and playback function, can also help performers recall performance effects and make targeted connections. 5、Multifunctional Button: With 200 tones, 200 rhythms, 50 demos and volume or speed control buttons, and the LED screen can simply and clearly display the status.