Mad Catz R.A.T.TE Tournament Edition Gaming Mouse for PC and Mac (MCB437040013/04/1) Built for the competitive gaming Elevated precision Cleared for lift-off Simplified target tracking 27 custom paths to victory Personalize your dots per inch Tenaciously durable Fast and lightweight 8200 DPI Laser Doppler sensor with high-speed motion detection and 4 customizable DPI settings Adjustable lift-off height avoids issues with tracking on the z-axis Oversized Precision Aim button enables on-the-fly cursor sensitivity adjustment Intuitive drag-and-drop software interface accommodates 27 user-definable commands via 9 programmable buttons over 3 modes Fast and lightweight - weighs only 90 grams excluding the cable Left and right mouse buttons use OMRON switches rated at five million cycles 8200 DPI Laser Doppler sensor with high-speed motion detection and 4 customizable DPI settings Adjustable lift-off height avoids issues with tracking on the z-axis