Mini Silicone Neck Fan Portable USB Student Outdoor Adjustable Fan 1. Shell material: ABS 2. Noise: 45-50dB 3. Wind speed: 3 speeds 4. Charging time: about 3h 5. Duration: 3-6h 6. Charging interface: Type-C 7. Battery capacity: 1200mAh 8. Weight: about 400 g 9. Size: about 19 x 21.5 x 5.1 cm Features: 1. Multi-angle 3D three-dimensional air supply, you can rotate the fan head, the wind angle can be adjusted 2. 3 wind power, full-area wind, no wearing feeling, multi-channel wind chamber, air flow multiplication 3. Soft rubber connection in the middle, can be opened at any time, comfortable and not stuck in the neck, easier to wear and take out, twisting and pulling is not easy to break 4. Double turbine strong power, leafless design does not surround the hair, no sense of comfort personal wear, USB charging interface, long-lasting battery life 5. Built-in rechargeable battery, charging indicator light is often bright red light full of electricity lights out, with full power protection function, safe and reliable