87-key flexible bluetooth keyboard lithium battery 87-key flexible bluetooth keyboardSupport iPad 2, iPhone 4/4S, iPad and Galaxy Tab P1000/P7500 etcSupport computer based on Windows XP, Win7, Vista and Mac etcFlexible, foldable, roll-up, waterproof and made by silicone.Built-in Li-battery chargeable by portable mini USB.Appearance patent no.: ZL200930290711.7