Unless you have a 17-inch laptop it is unlikely your machine will have its own numeric keypad, so this external calculator from Genius is a possible replacement.

Genius is damn good at its budget peripherals as well as the more high-end PC playthings. Sadly, this budget wireless set feels rather unpleasant by its usually decent standards.The mouse works fine, if a little over-sensitive, and feels fairly solid and weighty.

For laptop users needing more speed and control than a touchpad can provide, an external mouse is an essential tool. Providing a fast and portable wireless solution is the Genius Traveller 915 Laser mouse for laptops (£25 inc. VAT).

Trackpads and the classic notebook nubbin are fine for the odd dally with your laptop, but if you're travelling around and still need to work then a decent travel mouse is a bit of a necessity.

How do you turn the humble mouse in to an innovative, dare we say it - sexy - product? We've had the optical/laser revolution, wireless desk rodents and of course the mousewheel, so where next?

Genius has done the impossible with the Traveller 355: brought some innovation back into mouse design. The traditional central scroll wheel is replaced with an optical sensor that responds to movements of your finger.

While Sony's excellent SMU-M10 is a travel mouse that tucks away into the slimmest of spaces, this travel mouse is a bit more cumbersome. It's the same size as a desktop mouse, so you'll need a thick laptop bag

The problem I've found with laser mice is that being a person of limited reaction times, the mouse pointer, or targeting reticule in games, moves around faster than my feeble mind can cope with.