88 standard keys as real piano</br>23 demo songs?? 100 kinds of rhythm?? 128 kinds of tone</br>Earphone jack?? also can connect with external speaker</br>Power supply: AAA batteries x 4 (not included) or 5 voltage DC adapter (included)</br>Support USB midi out??can connect with computer</br></br>Product Description</br></br>Develop the pianist in you with the Roll-Up Piano that lets you experiment with mixes??instruments?? effects?? rhythms?? and beats. You simply have to unroll this piano andconnect with power adapter. It has 88 keys?? as real piano??