Microsoft Wireless Intellimouse Explorer for Windows (Cobalt Blue) Microsoft M03-00072 Wireless Intellimouse Explorer for Windows (Cobalt Blue) Work on most surfaces and offers better durability, increased speed and accuracy, and consistent performance Navigate documents and Web pages effortlessly without using the on-screen scroll bar Customize the mouse by reassigning any button or the wheel to open a file or Web page Cushioned palm rest provides a more comfortable working position