1. Alloggiamento sfera / Trackball’s placement
2. Sfera / Trackball
3. Ruote foniche / Phonic wheels
4. Cilindretto / Cylinder
5. Rotella di scorrimento / Scroll wheel
6. Vite / Screw
7. Cavo USB / USB line
8. Circuito elettronico / Electric circuit
9. Mascherina posteriore / Back cover
10. Mascherina anteriore / Top cover
