Evecase iPad Air Case - Laptop-Style Multifunction Clamshell Bluetooth Keyboard Folio Case for Apple iPad Air & iPad 5 - for IOS 7 System, Detachable Keyboard Case w/ 360 Degree Rotatable Swivel Stand Multiple Viewing Angles (Black) Brand new Evecase high quality hard clamshell case with detachable keyboard for iPad Air Bluetooth 3.0;BROADCOM BCM20730 chipset Built-in 250mA rechargeable lithium battery,working time:20hours Detachable keyboard & 360 rotating Adjustable stand offers vertical and horizontal vewing angles Scissor-switch keys make typing effortless,QWERTY layout with dedicated function keys