PilotMouse Optical Pro
-Five button mouse with a scroll wheel
-Flexible rubber grips for maximum comfort
-DiamondEye optical technology for unmatched acceleration control and ultra-high speed tracking
-USB and PS/2
-Compatible with Windows 95, 98, ME, 2000 or XP. Mac OSX or later
-Righthand users only
-5 Year Warranty
Kensington PilotMouse Optical Pro, Optical, USB Type-A + PS/2, 800 DPI
Kensington PilotMouse Optical Pro. Movement detection technology: Optical, Device interface: USB Type-A + PS/2, Movement resolution: 800 DPI, Buttons quantity: 5