This mini USB finger mouse can be used on any surfaces except glass. Textile coating cable enhances free and easy movement. It has standard 3 buttons - left key, right key and scroll button. Quite easy to use. USB interface, Plug-and-Play, no installation needed. No mouse pad is required, just slide on any surface. Ergonomical design - reduce fatigue effectively Real hardware resolution 1200dpi - better buy for professional designers and game fans. Standard 3 buttons - left key, right key, scroll button included Digital encoder technology, operate precisely, prevent faulty movement effectively Textile coating cable (not rubber coating) - enhance free and easy movement Operation voltage: DC 5V Button dynamics pressure: 60g+/-5g Dimension: approx. 60 x 30 x 25 mm Compatible with MS Windows 98/2000/me/XP/Mac OS 9 and above