The AMU09US is the world’s smallest mouse to incorporate five navigation buttons. The 4th and 5th buttons are preprogrammed to function as the Internet forward-page and backward-page controls without the need for a software driver. The design of this Ultra Mini 5-Button Optical Mouse is ideal for the traveller using an external mouse in areas where space is limited. It is compact, lightweight and comes with a retractable cord that adjusts to the appropriate length for clutter free use. Stylish, yet practical; it uses the latest optical sensor technology providing precision and accuracy in response to mouse movements.