Thermaltake Tt eSPORTS Azurues Optical Gaming Mouse for FPS Games with Omron Gaming Switch (MO-ARS003DTD) Designed from the ground up to achieve best possible gaming performance for First Person Shooter (FPS) games such as Counter Strike, Team Fortress, Call of Duty or Crysis Series Weight Customization System - enables each individual gamers to fine-tune the perfect mouse weight for the smoothest movement. True DPI Switch - (True 400DPI / True 800DPI / True 1600DPI) Advanced firmware design takes full use of the USB bandwidth to eliminate any possibility of latency so gun shots are fired when you want them to. Enlarged Teflon feet with low-friction coating for ultra-smooth movement. Number of buttons: 3 Interface: USB Sensor Type: Optical Sensor engine: 1600 dpi Cable length: 1.8m braided Operational systems: Windows 7/Vista/XP