For accurate mouse tracking try the Microsoft 3500 Wireless Blue Track Mouse. Brilliant Blue Track Microsofts expert Blue Track technology provides excellent use of your mouse on most surfaces for pinpoint accuracy. Use it just about anywhere, your living room carpet, a bumpy surface or a wooden desk as this Microsoft 3500 Wireless Mouse accommodates your on-the-go lifestyle. Nano technology This mouse has a nano transceiver which plugs into a USB (Universal Serial Bus) port, providing flexible use whether you want to use it on your laptop at home or on an office PC. There is a slot in the mouse that the transceiver can go in to, making this mouse readily transportable. This mouse will run off one AA battery for up to 8 months, providing long-lasting use before it requires a charge. The battery indicator informs you when your mouse is running out of charge so you wont be left surprised! There are 3 customisable buttons, enabling you to get more out of your computer. For practical & excellent mouse use try the Microsoft 3500 Wireless Blue Track Mouse.