Eurekka&reg; Bluetooth Wireless Keyboard and 360 Degrees Rotating Case for Apple Ipad 2, 3 and 4 Plug in and play, no software installation needed. 360 Degrees Rotating Stand for horizontal or vertical viewing while in the case. Stand by time 20 days. Built-in rechargeable li-ion battery takes 3 hours to fully charge. Only for iPad 2, 3 and 4 NOT compatible with iPad 1.