IOGEAR's Spill-Resistant Keyboard and Mouse Combo is designed to be protected from accidental splashes and spills that may occur at the work place or home office. The strategically placed canals under the key will allow the fluid to stream away from the keys through the drainage channels. The new sleek design provides better tactile feeling and less pressure on your fingers and wrists. In addition, the optical mouse provides optimum accuracy over most surfaces and minimal hand movement Mouse Included: Yes Mouse Interface: USB Tracking Method: Optical Palm Rest: N/A Hand Orientation: Both Hands Operating System Supported: Windows 2000/ XP/VISTA/7; MAC OS X (10.2.x or later) Features: Spill-resistant feature protects your keyboard from accidental splashes and spills 800 dpi high resolution opticalsensor delivers precise cursor movement and can be used on most surfaces Convenient LED status indicator, easy to view Num Lock, Cap Lock, and Scroll Lock LEDs Curved space bar keeps your hands in a more natural position