The Full-Size Ergo Mouse's soft rubber grips, wide palm area, and sculpted sides for added grip, which follow the natural curve of the hand, significantly improve comfort and reduce wrist and hand strain. Five DPI levels are movable with the UGREEN wireless mouse (4000/2400/1600/1200/800), allowing you to freely select the cursor speed to suit a variety of gaming, office, and home needs. The Ultra Silent Mouse This laptop wireless mouse's low noise design can cut down on click sounds by 90%, making it incredibly quiet whether you're clicking, scrolling, or moving the mouse. It's perfect for meeting rooms, libraries, and bedrooms. 18-Month Battery Life: The UGREEN wireless mouse's battery lasts up to 18 months. essentially doing away with the requirement for new batteries;