Adesso iMouse W2 - Waterproof Anti-Microbial Touchscroll Mouse Anti-Microbial: Then anti-microbial silicon material prevents the growth of harmful bacteria and germs and can be cleaned with soap and water or disinfectants. Waterproof, Oil Proof and Dust Proof: Sealed with a silicone material overlay, this mouse is 100% waterproof, oil proof and dust proof and can be cleaned with soap and water and other liquid cleaners. Advanced Touch Scroll Pad: Scroll up and down with the touch of one finger. Replace your traditional scroll wheel mouse with the advanced iMouse W2 touch scroll pad. 800 DPI Enhanced Optical Engine: Theoptical sensor technology keeps the device precisely on point and lets you work on most glass, wood, marble and leather surfaces without a mouse pad.