E-THINKER 9.7 Inch Wireless Magnetic Multi-angle Aluminum Bluetooth Keyboard 4000mah Lithium Battery Cover Case for New Ipad 4 Ipad 3 Ipad 2 and with Battery Power Bank Charger for Ipod, Iphone, and Other Cellphone - Silver The unique slot magnetic design strong magnetic firmly attract ipad to effectively protect the ipad from slipping out of the ipad bluetooth keyboard Built-in 4000mAH lithium battery and output USB port , can charge ipad, iphone or other devices at any time Built-in bracket can support your iPad with a comfortable position for typing and watching videos With built-in lithium battery, you can charge the bluetooth keyboard via the attached Micro USB cable When you do not use the keyboard, you can cover with your iPad so as to perfectly protect the screen from dust and scratches