GE Ergonomic Design Optical Mouse for Both Hands, Black (98529) Wired optical mouse High-speed movement and pinpoint accuracy No moving parts to break down No mouse ball to get dirty and skip Quiet scroll wheel for smooth web and document scrolling/zooming Scroll wheel doubles as a button for special functions Ergonomic designs conforms to the shape of your hand for optimal support and comfort Works with any USB-enabled computer Optical Technology Ergonomic Design Scroll Designed For Both Hands USB Black