Portable Ultra-long Life Portable Small Leafless Refrigeration Fan Mini Small Fan Hanging Neck Features: Full-area refrigeration system, compressed release, cold through the circulating ducts sent out of the ice porcelain freezing tower to provide a double effect. Three-dimensional wear non-stick neck, not stuffy, not curly hair upper and lower centrifugal fluid ducts, effectively hair inhalation problems. MAX ice feeling surround effect . Built-in P-N semiconductor cold crystal 14500mm2 hole scientific algorithm. Real refrigeration does not exist heat, double , wildly 26 ° C, even if 42 ° C hot summer, but also 3 seconds will be to 16 ° C. Continuity super lasting, although small! But I can be cold for a long time, fully charged, to meet the morning, noon and night a day . The of the performance explosion, blow all day! Are not hot, no sub heat, not low power consumption, but also more secure. core noise reduction turbine, the first new generation of fan class ANC noise reduction technology sound as low as 36db. Product Description: size：208*206*55mm Including: 1X fan and 1X charging cable Net weight of product: 265grams External dimensions: 56 X 198 X 226 mm Noise: 36-45dB (inclusive) Motor type: Brushless motor Built in battery capacity: 2000mAh to 4000mAh (inclusive) Duration: 6-8 hours (inclusive) Wind speed gear: 5th gear Power mode: USB Wind power device: front and rear ventilation Additional features: LED lights Small Table Fan Mini Portable Tower Fan Adjustable Quiet Desktop Fan USB Fan for Office Dorm USB Clip-On Fan for Home Office and Outdoor Cool Needs Hanging Charging Portable Outdoor Neck Fan Brushless Silent Fan Desktop Fan USB Rechargeable Office Outdoor Camping Portable Handheld Fan