1. 3 buttons optical mouse can be made in different colors 2. Ergonomic design 3. It can be used on any not reflecting surface 4. The compatible systems: Win98, ME, 2000, XP, VISTA 5. Life cycle: 1,000,000 times 6. The exterior size: 88 x 49.5 x 32mm; 7. Resolutions: 800cpi 8. Interface: USB, PS/2,U+P;