Roll Up Piano 88 Keys Hand rolling Portable waterproof Silicone Piano Roll Up Piano 88 Keys, Hobbies & Toys, Music & Media, Musical Roll Up Piano Best Roll Up Pianos Melody Maker Magazine 49 Keys Electric Roll up Piano Portable & Educational. This roll up piano is equipped with a numeric keyboard for 128 tones and 128 rhythms listed in the manual. You can quickly switch to the tone or rhythm you want instead of tap several times. Compared with other common products on the market, our product is more light only 2. 76 pounds. The piano built in 20 demos, the working time could be last for 12 13 hours. The roller piano can be played on any plane you want, such as a table, floor, and bay window. You don't even have to open it completely to play. The piano can be rolled up to a small size into a small bag for you to store or carry out. Long battery life and loud loudspeakers can prevent you from being bothered by wires which is suitable for a family party, classmate party, birthday party. Just play it to increase the happy atmosphere.