"PRODUCT DESCRIPTION"
 
 "MOUSE USB"
USB Interface
Click once, instead of twice
2x Button
Precision Optical Sensor
Works on most surfaces
800 dpi
Compatible with Windows 2000/XP/2003/Vista/ Windows 7 and Mac OS
 
"MOUSE PS2" (Personal System)
PS2 Wired Optical Mouse
Optical Track
 2X Click Button
 800 DPI; 4 Buttons
 Wired Optical Mouse