Feature: 1. Long Service Life: This roll up keyboard piano is made of excellent quality plastic, silicone keys, abrasion resistant and soft, and its lightweight rollable design makes it easy to carry and enjoy playing anytime, anywhere. 2. LED Digital Tube Display: This hand roll piano keyboard with LED digital tube display is convenient for recording, editing, playback, sustain, vibrato function, teaching, chord function, and external sustain pedal. 3. Easy To Carry: This roll up flexible piano keyboard has a foldable design, which is small in size, light in weight, compact and lightweight, with a soft body, making it easy to carry and use on the go. 4. Built In 1100mAh Lithium Ion Battery: This 88 keys roll up piano has a built in 1100mAh lithium ion battery, allowing you to practice your fingerings anywhere, anytime, or use it for 9‑10 hours of continuous use, suitable for classroom and small group teaching environments. 5. Good Performance: This 88 keys portable piano has built in speakers, 128 international standard tones, 128 international standard rhythms, 14 demonstration songs and other sound effects, and uses USB MIDI output to connect to a computer for music editing. Specification: Item Type: 88 Keys Roll Up Piano Material: Silicone, Plastic Power Supply: Built In 1100mAh Lithium Ion Battery or USB 5V Power Adapter. Package List: 1 x Hand Roll Piano 1 x USB Charging Cable 1 x Plug 1 x Sustain Pedal 1 x English Manual