3-Speed Powerful Airflow: This newly waist fan can blow a powerful airflow of 18000 RPM, With 3 gears and adjustable wind speeds from natural to strong, it can be set to various modes according to your needs when you are using it. Dustproof, anti-slip and drop-proof: Our personal waist fan are designed for most outdoor fan use scenarios, such as farms, fishing, climbing, hiking, and other outdoor activities, with the addition of a silicone protective cover that not only provides non-slip functionality, but also makes it more to drops, using our portable waist neck fan is a great choose to make these activeties. The maximum wind speed persists for hours, whereas the minimum wind speed can endure for as long as 40 hours.The powerful air can take away your body heat in seconds, helping you stay cool on the farm, working outdoors and more. Charging Flexibility and Compact size: This portable neck fan can be quickly via USB chargers, laptops, car chargers and other USB-enabled devices. Thanks to its compact size, you can take this waist fan cooling wherever you want. Not only can it be used indoors , but it can also cool your outdoor activities such as yard work, Fishing, Hiking, and Traveling and Etc.