Symmetric and Ergonomic Design. The 3-button optical mouse features symmetric design with textured sides, which makes it fit your left or right hand perfectly and securely. Minimize your hand fatigue while in use. Superior Comfort and Durability. Sweat-resistant matte finish of wired USB mouse offers you comfortable grip. Rubber scroll wheel is easy to scrolling up and down. 5,000,000 keystrokes test ensures long lifespan. 3-Level Adjustable DPI. Easy to switch DPI level (1000/1600/2000). Experience enhanced responsive cursor control and smooth movements on most surfaces. Meet your demand of daily office working and personal preference.