Made with antimicrobial material which prevents the growth of harmful bacteria and protects against the buildup germs between washings. Multimedia Controls Control your media player with just one touch using the built-in Multimedia Hotkeys for easy access to your favorite video or music playlist. Windows One-Touch Controls Instantly open your favorite Windows applications, such as My Computer, Calculator, Mail, or search without having to navigate with your mouse. Quiet Membrane Key Switches Membrane key switches provide a better tactile response and a quieter typing experience. Plus they last up to ve million keystrokes. Optical Sensor Optical sensor technology improves precision and even lets you work on most glass, marble, wood and leather surfaces without the need of a mouse pad. With an optical resolution of 1200 DPI, you can browse comfortably basically on any surface.