The Wireless IntelliMouse Explorer came with Microsoft's Intellipoint 4.0 software. You are able to customize all of the usual mouse settings with this software such as button assignments, pointer style, pointer speed, double-click speed, orientation and clicklock. Several options did in fact catch my eye. The first of these is the fact that you are able to assign your buttons to do different things in individual programs. For example, if you want the thumb buttons to be "Copy" and "Paste" in Microsoft word, but want these same buttons to be "Undo" and "Redo" in Adobe Photoshop, you are able to do this with the Intellipoint software.
The second noteworthy feature that caught my eye was the ability to adjust the scrolling speed to as many "lines per scroll" as you like. This is especially handy if you read long documents and need to scroll through them quickly. You can also set it to scroll one "screen" at a time.