Priced in the region of £35, the requirement for this mouse is any system capable of running Windows XP and later with 100MB of hard disk space or Mac OS X 10.4 with 30MB of hard disk space.

Compared to the price you pay, it is good purchase. Its looking from the picture is better than what really it is.

Has been working great ever since I received it. Battery life is long and efficient and it has its own port to place the USB Bluetooth hub for easy storage when not in use. Batteries are included so that is also a plus

I've tried, butnever been able to ditch the mouse and use the touchpad exclusively. I used to buy expensive Logitech mice, and each time they would fail after a year. The computer support person at work recommended the Microsoft mouse. I had my doubts, but he was right.

I am not sure of this is worth the money. It probably is but did not quite provide the extra difference a premium mouse should offer. There is nothing wrong with it; more nothing especially right with it. The fact that it is better than OK probably means I am being fussy.

The Microsoft Wireless Mobile Mouse 4000 is a very capable travel mouse that's well worthy of our recommendation. Convenient, versatile and reasonably priced, it doesn't leave much room for complaint.

BlueTrack technology means the mouse works on almost any surface; Suitable for both right- and left-handed users; Contoured shape; Wireless transceiver attaches to undercarriage

Limited battery life of non-rechargeable AA batteries; Smooth vertical rocker lacks precision

The Wireless Mobile Mouse 4000 is Microsoft's latest travel mouse. It offers many of the same features as the Explorer Mini , but does so for $20 less. This $40 device also uses Bluetrack sensing technology, which lets you use it accurately across a variety of surfaces that a normal laser mouse just...

Bluetrack technology tracks on almost any surface; "Power" slider conserves battery; right and left hand compatible; contoured shape; transceiver attaches to undercarriage

Limited battery life of nonrechargeable AA batteries; smooth vertical rocker lacks precision; pricier than other mobile mice

While there are plenty of wireless notebook mice around, that hasn't stopped manufacturers attempting to try and innovate. Microsoft's latest attempt is the Wireless Mobile Mouse 4000. It's a wee little nipper - 61mm by 103mm - but despite its size it's relatively comfortable.

Small; portable; and full of useful features

Becomes uncomfortable with protracted usage

The mouse arrived in less than 24 hours from ordering online and was 15 pounds cheaper than the high street...can't go wrong. The mouse itself is nice but i would advise trying it in a shop before you buy online to make sure you feel comfortable using it.

The size is just right for my small hands. I bot two. the first time I hooked up to a computer USB port about five feet away from the mouse it didn't work well at all. USB was on the side and away from the mouse. I placed it in the back and a foot closer and all is well.