M/N: A-198 Key features & Specifications: 1. Creative egg shape design 2. Crystalline or metallic cases bring you brand new handling feel 3. Compact size, ideal option for travel users 4. Adopt enhanced optical technology, Egg mouse has not only precise orientation but also up to 1000dpi high tracking resolution 5. Work on almost any surface except glass and mirror 6. Various color shells available 7. 3 buttons & a scroll wheel 8. Power rating: 5V, 100mA max 9. Operating Force:75+/-20gm 10. Dimensions: 95*52*31mm 11. Weight: 60g