Made of Antimicrobial Materials which prevent harmful bacteria from growing on the device surface. 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 five million keystrokes. 1000 DPI Resolution - Optical sensing 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 1000 DPI, you can browse comfortably basically on any surface. Optical Technology - Features optical technology to work on virtually any surface, with improved speed, accuracy and reliability, without the hassle of clogged mouse ball.