Radon Opto is the ultimate Radon family add-on, designed for those who prefer optical sensors rather than laser sensors. Our engineers have worked hard shoulder to shoulder with professional gamers to get the perfect balance between a low liftoff tracking distance & a flawless performance. Making this mouse perfect for FPS (first person shooters) players. Sensor Radon Opto uses the Avago ADNS 3090 optical sensor, which goes up to 3500 dpi, offering the maximum accuracy for an optical mouse. This high performance sensor is based on a new & faster architecture with enhanced navigation. The sensor is capable of sensing high speed mouse motion for increased user precision & smoothness. Ergonomics & Comfort. The better you grab it, the better you play, thats why Radon Opto features extra-large bottoms, ergonomic design & a rubberized body for easy grip & lateral reinforcement for optimum thumb grip.