Beston 61 keys Bigfun Electronic Piano Keyboard comes with LED Display, Adapter and Microphone. ( ADAPTER & MICROPHONE INCLUDED ). FEATURES are 61 Keys, 16 Tones, 10 Rhythms, One Stereo Speaker, Volume Control, Tempo Control, Record & Play, 6 Demos, 8 Drum Combination Keys & LED Display. IT HAS ONE SPEAKER. It can be easily powered on by Usb cable connected with any computer or even power banks. This Piano makes a perfect first instrument for small children and Beginners. The 61 keys allow the development of visual and auditory memory, as well as fine motor skills. It's packed with different functions and sounds. There's even a record function, so that any tunes can be played back later. Plug in the microphone and you can sing along to either your own song or one of the preloaded tunes. IT CAN ALSO BE OPERATED WITH 4 "AA" SIZE NORMAL BATTERIES ( Not Included ).