As the market leader in computer ergonomics, Kinesis has been designing and building premium-grade ergonomic keyboards for more than 25 years. The Advantage2 features Kinesis' patented Contoured keyboardTM design and low-force mechanical key switches to address the major risk factors associated with keyboarding for maximum comfort. The fully programmable Advantage2 features Kinesis\u2019 all-new SmartSet Programming Engine that allows you to customize the keyboard\u2019s layout without installing any clunky software or special drivers, or accessing the internet. Record macros, remap keys, and much, much more. SmartSet works on all major operating systems and enables users to easily create, view, edit, share, and backup their custom layouts. The Advantage2 Silver model (KB605) features a number of cosmetic upgrades for a custom look: a painted silver top case and your choice of Dark Gray or Kinesis Blue Home Row keys (both sets included). Advantage2 uses generic HID (human interface device) drivers provided by the operating system. It can be operated and programmed without any special drivers in most environments supporting USB devices, including the following operating systems with an available USB port: \u2022Windows 7, Windows 8 & Windows 10 \u2022Mac OS 8.6 and higher (Not compatible with non-US layouts) \u2022Linux \u2022Android. Package Contents: Advantage2 keyboard, Quick Start Guide, 4 extra Mac and PC keycaps, 8 extra Blue Home Row keycaps, & keycap puller.