ERGONOMIC SPLIT-KEY DESIGN: Integrated palm rest supports your wrists by releasing median nerve pressure to reduce forearm tension. Natural arm and hand position while typing to minimizes the chances of RSI or carpal tunnel syndrome. WIRELESS 2.4 GHZ AND BLUETOOTH CONNECTION: Switch between two connection options equipped with a nano receiver for wireless connection which can be found and stored on the bottom of the keyboard for convenience. DUAL OPERATING SYSTEM: Compatible with Mac and Windows including shortcuts and function keys; 4 additional switchable keys for Mac of Windows key layout and a key puller is also provided in the box. TACTILE RESPONSIVE KEYS: with long travel distance that gives a satisfying typing feeling and decreases mistyping SYSTEM REQUIREMENTS: Easily switch between Mac and Windows operating system