The Oyster Mouse is a specialist ergonomic mouse, primarily aimed at people spending long periods working at a computer and at corporate/occupational-health buyers.

Its big feature is unusual: the body can be physically adjusted through five different vertical angles. Instead of buying a fixed vertical mouse and hoping the angle suits your hand, you progressively open the Oyster until you find a comfortable position.

It also works left- or right-handed. You rotate the mouse 180° and change the left/right setting, meaning someone can even alternate hands during the working day.

There's also a wide lower platform designed to stop your little finger dragging across the desk, and the manufacturer positions the vertical grip as a way of reducing forearm rotation and keeping the wrist in a more neutral position.