The R.A.T.PRO X3 from MAD CATZ is engineered for incredible agility and armed with a magnesium alloy chassis that's light and super strong. It comes with 3 different palm rests, catering to all hand sizes and shapes. The customizable scroll wheel allows you to tweak resistance and tactile feel depending on the game you play. There are also 2 choices of pinkie rest plus 2 sets of thumb rests, designed to offer support and reduce fatigue. You also have a choice of ceramic or Teflon feet so you can create the ideal feel to match your gaming surface. The scroll wheel system uses optical technology and analog axis capability, re-inventing the scroll wheel functionality. The mouse gives you the ability to precisely calibrate tension and speed, and swap the actual wheel itself with a choice of materials providing a distinctly unique feel. Use in conjunction with the MAD CATZ programmable software and use the scroll wheel to effortlessly drive your car, fly your plane, reload your weapon, and more! Armed with the Pixart PMW 3389 optical sensor, the mouse is equipped with 16000 DPI, capable of keeping up with extreme movement speeds of up to 400 in. per second and 50G of acceleration. Switch between 4 different DPI settings at the touch of a button, crucial for ensuring that your gaming weapon never lets you down! The R.A.T. PRO X3 comes fitted with durable switches that provide a life expectancy of more than 50 million clicks. R.A.T. customization goes beyond physical adjustment.