1. Material: ABS+silicone+PP+electronic components
2. Noise: 36dB or less
3. Features: silent operation, long-lasting battery life, 3 speeds, compact and portable, with lanyard, hidden fan blades
4. Size: 99x88x44mm
5. Battery capacity: 1800mah
6. Power mode: USB/built-in lithium battery
7. Charging time: about 3.5 hours
8. Input current: DC 5V/1A
9. Rated power: 3w
10. Gross weight: 210g
11. Net weight: 140g
12. Life time: about 4.5-2.5 hours