If you?re going to play at the highest level, you need a mouse that gives you an edge. The Logitech MX 518 Gaming-Grade Optical Mouse does exactly that with its ultra-high resolution, 1600-dpi MX Optical Engine that delivers lightning-fast response and mirror-smooth tracking. The MX 518?s advantages don?t stop there. You get instant, on-the-fly sensitivity adjustment that lets you switch effortlessly from pixel-precise targeting to fast-twitch acceleration, without any software. And the contoured grip ensures peak performance and comfort, even during the most intense gaming sessions.