Microsoft SideWinder X5 Mouse 2000 DPI Laser Tracking Engine - For fast action Built to Last - Main button life: Rated to 10,000,000 clicks On-the-Fly DPI Switching - Instantly switch sensitivity between high (2000), medium (800), and low (400) with one click. Five Programmable Main Buttons - Customize your main gaming buttons to your preference. Macros - Create and assign macros out-of-game using included software.