1. Noise: 36dB or less
2. Features: small and portable, quiet and comfortable, three-speed adjustment, neck hanging, night light function
3. Size: 8.2×4.5×12.7cm
4. Input voltage: 5v
5. Output voltage: 2.6-4.2v
6. Charging time: 2-3 hours
7. Output power: 1-3.5W
8. Input current: 0.5-2A
9. Power supply mode: USB/built-in lithium battery
10. Battery capacity: 500mah
