Experience the reliability and comfort of the Microsoft 1.1 D66-00034S Optical Mouse. You’ll enjoy hours of productivity with less fatigue thanks to the ergonomic shape designed to support your palm where you need it most. The symmetrical design is also perfect for left or right hand orientation. You’ll find getting your work done on the go was never easier with three buttons and a convenient mouse-wheel for scrolling through long documents quicker. You’ll also appreciate the optical sensor that offers better precision and control, which results in less incorrect clicks. The sensor also tracks reliably over almost any surface so you can use your favorite mouse pad, desktop or fabric. The included PS/2 adapter lets you choose where and how you connect your mouse. Add the Microsoft 1.1 D66-00034S to your home PC today!
Pros: Works well, inexpensive, rugged.
Cons: They're not free!
Overall Review: I've been using these for years, and really like them for systems I build. The three I just received form Newegg DID come with the USB/PS2 adapter.