The days of clicking the mouse wheel are over thanks to the 3Dconnexion CadMouse's dedicated middle mouse button. It's simply more comfortable and convenient to press than the scroll wheel. And because enhancing the way CAD professionals work, rest and play is in our DNA, we housed it in a stylish matte black and steel ergonomic design that supports your hand in a comfortable and natural position, hour after hour. Other mice aren't designed with CAD users in mind, but the 3Dconnexion CadMouse was born for it. With 3Dconnexion's QuickZoom, you can effortlessly zoom in and out of your geometry with a single click of a thumb button. With the 3Dconnexion CadMouse, you're in complete control thanks to its advanced laser sensor. With 8200dpi and a poll rate up to 1000Hz (responsiveness of 1 millisecond) you'll click exactly where you need to, when you need to. It's the level of precision CAD professionals demand-and deserve.