mouse - The Microsoft Wireless IntelliMouse Explorer is the latest generation of optical wireless mice from Microsoft and this is the top of the range model. The IntelliMouse Explorer is available in four different colours; metallic grey, platinum, metallic blue and black leather. My review sample was metallic blue and looks very stylish. The first three are made entirely out of plastic, whereas the black leather model is actually finished in black leather, but it commands a price premium over the other three.