T50 Ultra-Core Optical Gaming Mouse with Light Strike (LK) Optical Switch & Scroll - Shift Lever and 8 Programmable Buttons with Advanced Macros - X'Glide Armored Mouse Feet - Wired - Black/Silver/Red LIGHT STRIKE - Innovative optical technology powers the Premium LK Optical Switch & Scroll Wheel that reacts at light speed with a quick 0.2ms click response. INFRARED SCROLL WHEEL  Not only did we want gamers to have the fastest click response time but we wanted them to enjoy the fastest wheel response GLIDE SMOOTHLY  Our X'Glide metal mouse feet technology adds durability and improves the glide of the mouse GAMING GRADE OPTICAL ENGINE - 4000 DPI / CPI  On the Fly DPI adjustment in 100 DPI increments. CUSTOMIZE YOUR GAME - Advanced custom Macros and 9 Fully programmable buttons.