Product Description 1. Innovative horizontal and vertical scroll modes, programming the context menus, as you like. 2. Big-button wheel can be used for double clicks and universal scrolling. 3. Easy zoom-in and zoom-out 4. Control software works with windows 95/98/NT/2000, 5. Rubber coat,and various colors design available. 6. PS/2 or USB. Specifications: 1.Size: 107(L)X56(W)X31(H)mm 2.Cable length: 1.5m 3. Hardware resolution: 800Dpi