Logitech G9X Programmable Laser Gaming Mouse with Precision Grips Interchangeable grips let you choose a fit and feel that's best for your playing style (includes Wide Load and Precision grips). Next-generation gaming laser gives you game-changing precision at any hand speed. Onboard memory lets you program up to five ready-to-play profiles (for keyboard macros, dpi settings, and LED colors).* * Requires additional software installation. Weight-tuning system gives you up to 28 g of extra weight for personalized feel and control. Custom-color LEDs let you match your mouse to your PC, your game, your style.