The hand roll piano is a versatile and portable musical instrument great for musicians on the go. Made from great silicone, this foldable piano keyboard is battery-powered and comes with built-in speakers. Whether you're practicing , performing at a friend's house, or traveling, this roll-up piano keyboard offers the convenience and flexibility you need. Features -Color:Black -Material:Silicone -Size:136.00X19.50X2.50cm/53.45X7.66X0.98in -Size:100.00X1.50X0.50cm/39.30X0.59X0.20in (USB cable) -Note: Powered by USB (included) or 3 x AA battery (not included) -Portability: the foldable design allows for easy storage and transport, making it great for musicians on the go -Full range: this piano offers a complete range of notes, suitable for all types of musical performances -Battery powered: operates on batteries, eliminating the need for an external power source, can , anytime -Silicone material: made from soft, comfortable silicone that is easy to clean and maintain, ensuring a pleasant playing experience -Builtin speaker: features a builtin speaker with clear sound quality, allowing for direct performance or headphone connection Package list: 1 x foldable piano 1 x USB cable 1 x specification