Running Change Upgrade* BC3332-S Gaming High-Performance Optical Engine - 8000DPI / CPI Adjustable - Pair with Bloody Gaming Mouse Pads for Speed, Precision, and Control This exclusive upgrade adds durability for the mouse feet and improves the skate and glide of your mouse. Improves your ability to stay agile. Best paired with Bloody Gaming Pads/Surfaces to make your gaming mouse glide like butter. Click Response Less 0.2 ms Without any traditional metal bouncing noise. Performs extreme 0.2ms light speed response with over 20 million clicks lifespan! Innovative Light Strike optical switches and hyper-speed mouse wheel provide you blazing fast responsiveness. Stay one step ahead of your opponent by using infra-red beams instead of mechanical metal components to actuate crucial commands. Built-in memory supports macro/script editing for advanced tuning. All mouse buttons can be programmed.