The Dell Office mouse has aDPI of 400. This is the highest DPI of any mouse on the market and makes it perfect for use with high-resolution graphics applications, such as CAD or 3D modelling. Dell's Office mouse, the Dell Mouse 2200, has a DPI of 200. This means that it will move the cursor on your screen at twice the speed of a standard mouse. This can be helpful if you are used to working...