Wall-mounted Fan Outdoor USB Charging Waist-mounted Portable Fan - Black+Blue

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1. Unit weight: about 225 grams2. Dimensions: 109 × 80 × 49 mm, USB cable 30 cm long3. Material: TPU, PC4. Specifications: battery capacity 4000mAH (3.7V / 14.8WH), working hours 16 hours low gear, mid-range 5 hours, large gear 3.5 hours, charging time about 3-4 hours, low speed 4500 rpm, mid-range 6000 rpm 7000 rpm5. Applicable occasions: home, office, study, work, travel, etc...