wheel scroll:
       wheel scrolls up and down, to get easier
Easy navigate through Windows:
      Simply roll and scroll along Windows, E-mail and Internet.
Fully Microsoft IntelliMouse Compatible Mode
      Supports 100 % Microsoft IntelliMouse functions. 
Enhanced Wheel Scroll Mode
      Scroll functions work with any Windows application allowing you to work with amazing efficiency.
 Use zoom under Office 97/2000
      Use zoom under Office 97 either magnifies or de-magnifies. Hold down the Ctrl key to zoom in/out, move the
       wheel forward/back
Auto Scroll
      Makes viewing long documents as easy as reading the credits at the end of a movie. Especially
       run under Office 97 and Internet.
520 dpi, 30 % faster than 400 dpi mouse
      Real 520 DPI hardware resolution is a boon for high-resolution monitors supporting resolutions
       of 800x600 and up.
Ergonomically Shaped
      Design to comfortably fit your hand and support your wrist for hours of tireless use.
Bundle with value-add iWheelWorks software
      A lot of function just for your easier, more detail checks the iWheelWorks section.
Programmable Wheel Button function as bellows:
      Supports 38 frequently used commands. Such as LuckyJump, NetJump, Auto-Scrolling, Alt, Ctrl, Shift,
       Alt+Left, Arrow, Arrow Down, Arrow Up, Arrow Left, Arrow Right, Cut (Ctrl+X), Cut (Shift+Del), Copy
       (Ctrl+C), Copy (Ctrl+INS), Enter, Esc, Exploring My Computing, Minimize all windows, Next Document
       (Ctrl+Shift+F6), Page Down, Page UP, Paste (Ctrl+V), Paste (Shift+Ins), Previous Document (Ctrl+F6),
       Run, Shift+F1, Shift +F10, Start, Tab, Undo (Ctrl+BkSpc), Undo (Ctrl+Z), Windows Find, Windows Help,
       Text, Minimize, Maximize, etc.

Specification
Mouse dimension: 122.5(L) x 64 (W) x 39.7(H) mm
 Mouse weight: 0.158kg
Packing
      1 pc/box: 190(L) x137(W) x 47(H) mm, 0.24kg
      60 pcs/carton:50.5*39.5*42.5 cm; G.W:13.5 kg; N.W:12.5kg
Container load: 19868 pcs/20', 39737 pcs/40'
 EMI: FCC part 15, subpart B, class B, CE