The Microsoft Desktop 600 Keyboard and Mouse Set connects to Windows and Mac systems via a wired USB connection so you can type and double-click your favorite apps. The Desktop 600 keyboard provides a spill-resistant design as well as 104 quiet-touch keys, which include multimedia, Calculator, and Windows Start hot keys. The mouse can be used in either the right or left hand and it features an optical 800 DPI sensor for accurate mouse cursor movements. 3J2-00001