Button: 3
Scroll Wheel: 1
Optical Resolution: 1000 dpi
Interface: USB
Size:

4 ½ (L ) x 2 ½ ( W ) x 1  7/16( H)inch
117 ( L ) x 65 ( W ) x 40 ( H )mm

Weight: 0.08 (KG)/ 0.18 (LBS)
System Requirements: IBM PC or compatible
Available USB Port
Windows 98SE/ME/2000/XP/Vista/7/8