Specifications:
1) 3D mini optical wheel mouse
2) Key life: over 1,000,000 times
3) Compatible with Windows 95/98/2000/NT/Me/XP
4) Dimensions (L x W x H): 94 x 52 x 31mm
5) Optical navigation technology, no mechanical parts
6) Deluxe ergonomic design, different colors for you to choose from, PS/2, USB and U + P available
7) Comfortable hand touch
8) Suits both left and right hands
9) Internet intelligence functions, optical driver for 3 programmable buttons
10) Scroll up and down directly without moving your mouse

Inner packing:
Dimensions (L x W x H): 94 x 52 x 31mm