If youve never used a wireless mouse before youll likely find the experience a real revolution--no more wires to get tangled up in and freedom from the frustrations of having a cable thats inevitably either much too short or way too long.

The mouse itself is powered by two AA batteries, which, according to the packaging, give many users an impressive average of more than six months operation. It uses low-power radio signals to connect via a small oval receiver plugged into the computer via either USB or PS/2. We found this receiver had a range of over 10 feet and worked quite happy tucked tidily away behind the computers monitor.

Unlike older mice, this model uses optical technology meaning that no mouse mat is required and there are no moving parts underneath to get gummed up. An optical sensor underneath the mouse (using a tiny camera to analyse movement) provides greater precision and smoother movement than was ever possible with an old-fashioned mouse ball.

Comfort and ease of use are very important with any mouse and the Microsoft Wireless Optical performs particularly well in this respect. With a sleek, ergonomic design, as pleasing to the eye as it is to the hand, the unit very quickly becomes a natural extension of your arm. Particular mention is also due to the inclusion of Microsofts tilt wheel--a new feature that allows the scroll wheel to move from side-to-side, as well as forwards and backwards, for both horizontal and vertical scrolling. When pressed down the wheel also allows you to switch between open windows.