Once in a while, a product comes along you simply must have. The new Logitech cordless optical mouse from is top of that list.

Eliminating the need to spend time untangling wires, this mouse combines this practicality with the ease-of-use and reliability of optical technology.

It fits comfortably into a smallish hand, either left or right, and works by tracking a beam of light across the desk surface, rather than relying on a revolving rubber ball to move internal rollers. There is nothing to break and bits of fluff won't ever be a problem again.

Because the mouse uses optical technology, it can be used on most surfaces without the need for a mouse mat and will never skip or drag the cursor across the screen, making it especially useful for anyone doing precise work such as graphics and design.

The mouse's optical sensor provides 800 dots-per-inch resolution, enabling users to move the cursor right across the screen in one wrist movement.

Optical mice with a lower resolution require users to move their whole arm, or to skate the mouse across the desk - a less convenient and potentially less comfortable movement.

But the mouse is a perhaps little on the heavy side because of the batteries.

Logitech's digital radio technology can use either a USB or a PS/2 interface and is compatible with Windows 3.X, Windows 95 and 98, Windows 2000, Windows XP and Windows ME, as well as Macintosh 8.6 or later operating systems.

Price: £39.99.

Contact: www.

logitech.com or 01753 870 900.

Feel good factor:

10 out of 10.