This is a top-quality optical mouse, imported from Japan. It's a modern style-classic: black and silver, elegantly shaped, precision engineered, and comfortable to work with.

It measures 68.5mm x 38.5mm x 26.0mm, has left-click and right-click buttons, a central scroll wheel, and a one metre cable, ending in a PS/2 plug. It comes with a small PS/2 to USB adapter.

An optical mouse doesn't use a rollerball, so doesn't pick up dust and fluff. As the mouse is moved, a light shines on the mouse mat or desktop. Changes in the reflected light are converted to a digital data stream which moves the on-screen cursor.

The optical sensor checks the surface for colour or texture changes about 16 times per millimetre. It's very sensitive and will pick up changes on most materials.