WT-F54 Wind From All Sides Long Battery Life Semiconductor Cooling Hanging Neck Fan 1. Using aluminum-grade semiconductor refrigeration chips, the powerful cooling is like walking into an air-conditioned room 2. There are 80 holes on the upper and lower air outlets, and the feeling of being surrounded by the wind 3. Double-layer turbofan, high-speed turbo motor 4. 24 turbine blades, 80 holes surround the wind, the design of the turbine blades and air holes can efficiently cut the air and let you feel a softer cool breeze 5. Partial silicone adjustment, in line with human body design, soft and comfortable material, light and comfortable as if nothing, enjoy the natural wind 6. The width can be adjusted at will, and it is more comfortable not to get stuck on the neck 7. Twist up and down to adjust, wind direction and wind force can be adjusted at will 8. Lightweight and long-lasting battery life, the cool breeze will accompany you all day 9. Light and comfortable noise reduction 10. Enclosed fine mesh for air intake, no curly hair, no sticky long hair to wear, safe and portable 11. Motor speed: 4000-5500rpm 12. Working voltage: DC 5V 13. Rated current: 0.4A-1.1A 14. Battery capacity: 4000mAh 15. Power supply mode: USBbuilt-in lithium battery 16. Battery voltage: 3.7V 17. Function: Up and down wind, semiconductor refrigeration, turbo blades, no curling hair 18. Material: ABS+Silicone 19. Dimensions: 185 x 56 x 219MM 20. Net weight: 370G 21. Gross weight: 563G