Trackball: Enhanced Dual-Wheel Scroll Mode Trackball Scrolling Technology Product Dimension Trackball: 6.1"(L)* 3.9"(W)* 1.9"(H) Package Contents: 1 Scrolltrack Advanced 4D Track Ball User's Guide 1 year warranty System Requirements: 1.Plug and Play(USB) for Windows98/ME/2000/XP(X64)/2003(X64)/MCE2005/Vista X86&X64, Win 7 2.Plug and Play(USB) for Mac OS 9.X~10.X "Hello, I wanted to say that I have been a user of the WWT-13 Trackball for just about as long as your company has made them. They are the most comfortable trackball I have ever used. They fit your hand very nicely and are very reliable with minor cleaning. The action of these units is much easier to use than even a mouse. I even got my two sons hooked on using these units for their internet gaming. Please continue to offer this fine product through your website and at retail stores. Thank you for your time" Rena, MA |
