Mad Catz The Authentic R.A.T. PRO S3 Optical Gaming Mouse - Black. The Mad Catz R.A.T. Pro S3 Gaming Mouse is built around a super lightweight design and is ideal for on-the-go use. Get light on your fingers with the R.A.T. Pro S3 Gaming Mouse. Built around a super lightweight design and weighing only 80g*, this mouse is ideal for on-the-go use and won?t weigh you down. Multi-button functionality lets you take control of your gaming experience. An adjustable DPI button lets you increase or decrease the DPI instantaneously, up to 7200. The precision button instantly increases or decreases the sensitivity, perfect for in-game sniping. With the included desktop software, you can create unlimited profiles for your mouse while storing the top 4 on the mouse itself. Create the perfect grip with the adjustable palm rest, letting you play in comfort. And with industry-leading OMRON switches, the R.A.T. Pro S3 can keep up with the even most furious clicker, with a 50 million click lifetime.