Logitech K811 Bluetooth Wireless Easy-Switch Keyboard Operating Time: Up to 10 days (with backlight ON), Up to 12 Months (with backlight OFF) Operating System Supported: Mac OS 10.6.8+, iOS 4.0+ System Requirement: Mac with OS X 10.6.8 or later iPad, iPad 2, iPad (3rd and 4th generation), iPad mini or iPhone with iOS 4.0 or later Internet connection (for software download) Package Contents: Keyboard User documentation 6-foot Micro-USB charging cable