Professional Colorful Backlight 4000DPI Optical Wired Gaming Mouse (4000DPI, Colorful) Buttons: 6 buttons with scroll wheel. Tracking systems: Optical. The Max DPI: 4000DPI. Adjustable DPI Switch: 1200/2500/3200DPI/4000DPI. Ultra-precise Scroll Wheel. Optical technology works on most surfaces. Ergonomically designed, long-term use without fatigue. Intelligent connectivity, no need to code, plug & play. Built-weight iron, feel comfortable, mobile and stability. Switch Life: 5 million cycle.