This is the Wireless Mobile Mouse 4000 from Microsoft. This is a 4 button mouse with 4 way scrolling. It uses BlueTrack tracking, which according to the info on the box, lets you work on nearly any surface. As shown, it is still brand new and sealed in its package.
Accepted payment methods are:
Money Orders and Cashier's Checks
Personal Checks (expect a hold of up to 10 business days for clearing)