Contour Design, Inc. It comes in five flavors which match the iMac flavors. The shell comes in a small box with company information and instructions on how to use the shell with your mouse.
Installation is in three steps.
Second, we inserted the mouse in the bottom shell and placed it in the position suggested on the box. Last, we snapped the top shell onto the bottom shell. It is very easy to do if the simple instructions are followed. There is little documentation with the product and this was intentional from Contour Design, as there is no need for it. Once the shell is snapped on the mouse, it is ready for use.