Logitech MK235 Wireless Keyboard & Mouse Sets Specifications and details (3) Specifications Keyboard Waterproof design Tilting mat 10-key numeric keyboard Special keys: 15 function keys Up to 5 million keystrokes 2 AAA batteries Battery life: 36 months Mouse Touch technology: Smooth optical tracking Number of keys 3 (left/right, center) Roll: linear Roller: Yes, 2D, optical. Connection/Power: Power switch button 1 AA battery Battery life: 12 months (4) Customize the application Works with Logi Options+ for Windows and macOS. (5) Compatibility System requirement Windows® 10, 11 or later ChromeOS Available USB port An Internet connection is required to download the optional Logi Options+ custom application