Quiet Foldable Fan - LED Display 4000mAh Travel

【3-in-1 Multi-Function Design】This compact 6.6 x 5.6 x 1.5inch (approximately 16.6 x 1.5cm ), 9.3 ounce portable fan combines USB fan, rechargeable battery fan, and portable charger in one. Perfect for home, office, travel or outdoor use; can keep cool even in hot weather 【Dual Usage Mode and Long Battery Life】Use it in USB mode for continuous cooling, or switch to battery mode using the built-in 4000mAh battery. After charging for 5.5 hours, you can enjoy 7.5-22 hours of runtime (depending on speed), making it perfect for all-day use. 【Ultra-quiet and 4 Adjustable Speeds】With noise levels below 35 decibels, this desktop fan won't interfere with your sleep, work, or study. 4 Wind Speed Settings - Gentle Breeze, Comfortable Wind, Strong Wind or Circulating Wind, Meeting Your Cooling Needs 【Humanized Function】180° Foldable design, adjustable wind direction, convenient for storage. Detachable fan frame for quick cleaning convenience. LED display monitors fan speed and battery life. Dual-purpose portable charger, charges your phone in emergency situations 【Safe Multi-Functional Cooling Solution】This portable fan comes with over-voltage and over-current protection, ensuring safety during use. Its 8mm pitch fan grid prevents finger injuries and is safe for children. This travel fan is suitable for indoor and outdoor cooling, such as traveling, sleeping, working, camping, etc