FlylinkTech Black Wireless Bluetooth Keyboard Case cover for Apple iPad 2 2nd 3 3rd 4 4th Gen Generation Tablet 2 in 1, it can both as a iPad case and a keyboard iPad display stand for easy viewing and typing Perfect designed for iPad 3rd / iPad 2 / iPad 4 Built-in Lithium Battery (450mAh which can last for about one week). Continuous standby for 100 days, if you use 4 hours everyday that you can use 20 days.