1. Material: plastic
2. Control method: force control
3. Applicable age: over 2 years old
4. Help resist anxiety and irritability
5. The gears are audible, ticking when rotating, very crisp
6. Five small round keys, three with sound, two underneath are silica gel without sound
7. The switch is a copper switch, not a pure plastic switch, it feels better when switching
8. Unit weight: 53g