USB powered: Powered by built-in rechargeable battery, can last 3 to 7 hours on a single charge. Comes with USB cable for easy charging using power bank, laptop or other power with USB port. Small and compact portable fan: handheld size and lightweight, convenient to take out or put in your bag. Great space saving for indoor and outdoor activities. Super Quiet: The plastic housing has been specially designed to absorb fan vibration to reduce noise. The hand-held fan runs as firmly as a friend whispers silently, keeps you cool without disturbing sleep, work or study. Outdoor:Portable fan is great to use both outdoor and indoors, which is suitable for many occasions, outdoors: Travel, camping, picnic and hiking for its size is easy and convenient to put and carry. New Version Clip On Fan And USB Desk Fan Dual Usage:Improved Version Unique Base Design, The USB Fan Desk Can Be Placed On The Desk Or Fixed To Your Desk And Headboard Securely, With A Strong Clip Fit Boards.