Found this on play.com! Its cheap as chips and a great bargain for cordless optical mouse!!!
Affordable and comfortable cordless mouse with highly precise optical tracking
Reliable cordless performance
High-definition optical technology
Quick and easy installation
Convenient scroll wheel
USB or PS/2 connection for Windows and Mac
Includes desktop wireless adapter with USB cable.
Documentation in English
Full product support
Dimensions: (WxHxL) 67 x 235 x 168mm
IBM or compatible PCWindows 98, 2000, Me, XP and Windows Vista, USB or PS/2 port
Macintosh system: Mac OS X 10.3.9+, USB port
Enjoy freedom from snagged and tangled mouse cords with the Logitech Cordless Optical Mouse. This affordable, contoured mouse combines reliable cordless technology with smooth and precise optical tracking. Setup is a breeze - just plug the receiver into your PC or Mac. USB and PS/2. 5-year guarantee.