A4tech SWOP-35

Classic optical mouse with PS / 2 connection in the traditional execution A4TECH in gray color, with three programmable buttons and scroll wheel to easily move through documents or web pages.Thanks to optical technology and rapid imaging is extremely accurate and sensitive, works on virtually any surface and does not require cleaning.Connects through PS / 2 interface, so it is suitable for older computers.
And specifications:
Keys:2 + wheel (third button)
Interface:PS / 2
Resolution:400 CPI (Count Per Inch)
Dimensions:124 x 68 x 38 mm
Weight:250 grams
Supported Operating Systems:Windows 95, 98, Me, NT 4th0, 2000, XP, Mac OS 8th5 - 9X