Pacoco Adjustable 2400DPI Optical Wireless Gaming Game Mouse 7 Button For Laptop PC 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. Switch Life: 5 million cycle and Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS or latest.