Yuzihan Roll up Mini Bluetooth Keyboard for Pad Tablets Phones Portable Silicone Rollup Waterproof Flexible Keyboard Blue Super Mini portable waterproof wireless bluetooth keyboard ,Much Smaller Than Standard size keyboard.Main Keys Are Much Smaller Than Adult Fingers and Compact.Length:256mm;Width:92mm;Height:4mm.(Battery Height:15mm) Support Multi Systems:Apple IOS / Android / Windows,Can be used for All iPads and iPhones ,Windows ,Android tablets and smart phones Light weight 95g Roll up Flexible Mini Portable bluetooth keyboard convenient to take,can be put in your pants pocket after roll up. Key in words silently,can be used for library work class indoor environment.