eco-friendly and nontoxic perfect combination for ipad size:235*135*7.5mmuse the ipad in a variety of positionssoft,waterproof,space saving designyou can use this keyboard with most device that have bluetooth or usb adapterwork with windows,mac,linux,ipad,iphone 4G,iphone 3GS if ungraded to IOS4bulit-in lithium battery:450mAh which can last for about one week fashion bluetooth keyboard for ipad