The Foldable Keyboard Piano is the ultimate portable and foldable piano keyboard. Tiny enough to fit in any backpack, its small size and light weight means that you can bring it and practice anywhere you want.Name:Roll Up Piano Portable Power supply: 3 AA batteries or DC 5V adapter Keyboard size:Control box: 10(length)×22.2 (width)×2.2(height) cmKeyboard: 73(length)×17.1 (width)×0.3(height) cmKeyboard weight: 720 gramsMaterial: Silicone rubber (keyboard); ABS plastic (control panel)Package：1*Hand-rolled electronic piano