Features:2 interchangeable gripsThe G9x comes with Wide Load and Precision grips that let you choose the fit and feel that's best for your playing style. The Wide Load grip's satin feel and fuller shape offer extra comfort. The Precision grip's DryGrip technology and compact shape give you exceptional fingertip control.Next-generation gaming laserGives you game-changing precision at any hand speed.* On-the-fly adjustable dpi to go from pixel-precise targeting (200 dpi) to lightning-fast maneuvers (up to 5000 dpi) without pausing the action. And Full-Speed USB (for up to 1000 reports/sec).* Up to 150 inches per second on most popular gaming-mousepad surfaces.Onboard memoryLets you program up to five ready-to-play profiles (for keyboard macros, dpi settings, and LED colors), so you can take your personalized settings when you're on the go. Profiles are stored directly in onboard memory.** Download of Logitech SetPoint software required for initial profile setup.Weight-tuning systemPrefer a heavier or lighter mouse? The G9x gives you up to 28 grams of extra weights that you can mix-and-match for personalized feel and control.** Contains small parts which may pose a choking hazard to children.Custom-color LED displayLets you match your mouse to your PC, your game, your style. LEDs light up to show your mouse dpi and profile settings. Choose the color of your LEDs from a wide color spectrum.MicroGear Precision Scroll WheelDual-mode scroll wheel provides precise click-to-click scrolling that's perfect for weapon selection in games. Or, switch to frictionless hyper-fast scrolling to fly through long Web pages.System RequirementsWindows XP and Windows VistaUSB portPackage ContentsLogitech G9x Laser MouseWide load and precision gripsWeight cartridgeTuning weights and caseUser manual3-year limited hardware warranty