The ergonomic shape of this wireless keyboard encourages you to use a more natural posture, keeping your arms, wrists and hands aligned for added comfort. You no longer have to be tethered to your desk as the keyboard and mouse will work up to 30 feet from the main hub. The keyboard has Favourite keys along the top to help you quickly launch your most popular programs. It also features Advanced Encryption Standard (AES) technology to help protect your information by encrypting every keystroke. System requirements: Windows 10/ 8/7 Mac OS X v10.4 - 10.7 USB port 4x AA alkaline battery (included)