Logitech - G400s Optical Gaming Mouse

Exclusive 4000 DPI Delta Zero Optical Sensor: Built for consistent, high-accuracy targeting in FPS games
8 programmable buttons: Perform single game commands or multi-command macros with a simple button click
On-the-fly adjustable DPI (400-4000): Instantly shift through multiple DPI settings without interrupting game play
Ultra-durable, comfortable design: Long-life buttons rated to 20 million clicks. Sculpted comfort grip. Advanced coatings help prevent hand from sticking to mouse
Made for PC gaming: Compatible with Windows 8, Windows 7 and Windows Vista