Microsoft Wireless Mobile Mouse 4000

This two-button wireless mouse features a scroll wheel and an extra button located on the left-hand side. It is available in black with a complementary colour - the five colours to choose from are black, white, blue, pink and green.

The Microsoft Wireless Mobile Mouse 4000 is easy to set up. You install the software that comes with the device on your Windows PC, insert the provided AA battery, turn it on and then plug the wireless transceiver into a USB port.

The device features Microsoft's BlueTrack technology which claims to will work on almost any surface with the exception of glass or mirrored areas. We certainly found no problems using the mouse directly on a desk or on a mouse mat.

We loved the fact that the Microsoft Wireless Mobile Mouse 4000's tiny transceiver can be stashed in the bottom of the mouse when you're on-the-go, while an on-and-off switch ensures the batteries are conserved when not in use.

Microsoft says one battery will last for 10 months, when a tiny red LED on the top of the mouse warns you that the battery is running low, reminding you to change the battery before the mouse becomes completely unusable.

We found the Microsoft Wireless Mobile Mouse 4000 buttons and scroll wheel were extremely sensitive, needing just the tiniest of touches to implement our command. The scroll wheel will also tilt side-to-side, allowing users to scroll side-to-side as well as up and down. Microsoft says this offers a more efficient way to navigate documents and spreadsheets and we did find this was a useful feature.

The Microsoft Wireless Mobile Mouse 4000 mouse also supports Windows Flip in Windows 7, which lets you see a preview of all open windows with the press of the mouse's side button.

We also liked the two top buttons and the side button were completely customisable, allowing us to assign other tasks we wanted to these buttons.