The 109-key Apple Keyboard features full-size cursor keys perfect for zipping up, down and sideways in a game or on a spreadsheet. Special keys provide immediate access to the system audio level (volume up, down, mute) as well as ejecting media from the Mac optical drive. Additionally,16 full-size function keys give applications plenty of ways to provide short cuts to common tasks. The Apple Keyboard also comes with additional full-sized keys for Page Up and Down, Home and End, Insert and forward Delete. \r\n\r\nImportant: Requires Mac OS X, v10.2 or higher.