Adjustable 10-Speed Cooling: With a 9000RPM brushless motor, this clip on fan reaches 20mph max wind speed. Its 10 speed settings adjust motor RPM for strong cooling or gentle airflow, ideal for work, hiking, or summer activities Offers 7-20 Hours of Cooling: With a 20,000mAh battery, this portable waist fan offers up to 20 hours at low speed and 7 hours at high speed. Ideal for extended outdoor activities or work without frequent recharging Versatile and Portable: This shirt fan offers a versatile design, allowing it to be used as a waist fan, desk fan, or neck fan for flexible cooling. Ideal for construction sites, gardening, theme parks, camping, or walking your dog 3-Level Lighting: This wearable fan features three lighting modes—two adjustable brightness levels for versatile use and an SOS light for emergencies. Ideal for camping, nighttime activities, or hurricane situations Smart LED Digital Display: The clear LED screen keeps you informed with real-time updates on wind speed and battery life. It even tracks charging progress, so you’re always ready to stay cool and comfortable wherever you go! Portable Waist Fan, Upgraded 10 Speeds Personal Fan Clip On Shirt, 20000mAh Rechargeable Neck Fans With 3 Lights, LED Display, Wearable Fans for Outdoor, Jobsite, Camping, Travel