Not a cheap mouse but a great mouse, £49.99+ at most e-tailers (Amazon marketplace £60+). It's usually on Amazon @ £46.99 so was very pleased to see the £9 drop.
* Logitech Darkfield Laser Tracking gives you precise cursor control on virtually any surface
* The tiny Logitech Unifying receiver stays in your notebook
* Take it anywhere thanks to its compact size
* Hyper-fast scrolling lets you fly through long documents and Web pages
* Able to quickly go back or forward in Web pages with a click of a thumb button