Portable, ultra quiet Neck Fan, indoor outdoor, no holding required, no propeller, 2000mAh, cooling Fan, USB charging, 3 levels wind adjustment. The neck fan has several ventilation openings to cool the face. Both adults and children can use it safely. Equipped with a 2000mAh battery, the battery life is about 6-12 hours. Half-closed ventilation openings prevent dust and sweat.