Spill-proof protection on keyboard with a thin membrane that protects the electronics from liquids. Full-size keyboard layout features six rows including numeric keypad. Optical tracking with 1200 dpi provides high-definition tracking for enhanced performance. Comfortable two-button, scroll wheel mouse design is ideal for mobile right-handed or left-handed users. 2.4 GHz wireless connection allows for complete freedom and mobility. Plug-and-play installation so you can be up and running quickly to start typing and scrolling. This product is designed to comfortably fit and be effective for users of all hand sizes.