Vertical Mouse Laptop Desktop USB Wireless Game Mouse Features: Scientific ergonomic design encourages "handshake" wrist and arm positions to achieve smoother and less overall tension. The 800/1200/1600/2400 DPI resolution optical tracking technology has higher sensitivity than the standard optical mouse, and can perform and accurate tracking on various surfaces. "Next/Back" button is added to facilitate web browsing; The choice for Internet surfers, game players and those who use computers for a long time. Key: left key, right key, forward key, backward key, scroll wheel key, DPI key. Explanation: "Mute" is a term commonly used in the industry, which means that the noise is low, but there is not no sound at all. The sound of the mouse is mainly the mechanical sound of clicking keys, and there is no mute mouse in the market Product Description: Product includes: 1x mouse Wireless Mouse Mouse Computer mouse Back to School Office Supplies