WetKeys Waterproof Professional-grade Ergonomic Optical Mouse w/3-button Scroll (USB/PS2) (Black) | OMWK0C01-BK Professional-grade ergonomonic sealed silicone optical mouse. Ideal for medical & dental offices, laboratories, food processing, manufacturing and industrial use and more. 2-button left/right click with 3-button scroll wheel. 1.6 meter cord with USB connector with PS2 adaptor. Do not immerse USB or PS2 connectors. Waterproof, Spill-proof, Dustproof and Debris-proof. Completely sealed - lets you wash fully under running water or use in wet areas. Washable. Easy to clean or disinfect. No gaps or openings where dust, debris, water and other liquids may damage or impede mouse functions. Can withstand safety wash-downs or being immersed in antibacterial solutions and rinsed under a tap to reduce the spread of germs. Resistance: Minimum NEMA4x and IP66 rated - dustproof, waterproof, chemical resistant and washable.