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.