Viniper 8.7 Inch Portable Rechargeable Fan, Small Table Fan :, Black, Blue Blade Product Details ? Long Working Hours, Battery Operated USB Powered ?viniper brand rechargeable medium size desk fan operates with 3600mah (Built in) and can operate for 4.5-14 hours after a full charge. At the same time, the bi-directional optimization of the motherboard and battery makes the Viniper usb fan have longer working hours. It can also be used via USB port from your PC/computer/USB charger or other USB devices. ?3-stage adjustable wind speed Quietness? Medium size but poweful. 3-stage easily adjustable wind speed. The speed of this portable desk battery fan can also be adjusted among low, medium, and high according to your demands. it is decent and quiet which ensure the peaceful flow of air, and enough for personal use. ?Strong Cooling 180Rotation?The Viniper rechargeable desk fan has a strong and stable wind that keeps you cool. not disturbing your rest and work. The USB desk fan has 180 degree adjustable rotation. ?Portable?Used high-quality ABS and Brushless copper motor. It has stable performance and long operating life. And It is trouble-free to put this (Size - About 8.7*9*2.2 inch, weight - About 16.4 ounces) and the exquisite battery usb fan carry it for outdoor events. Also, it can be used for indoor use. Ideal suitable for office, family, dormitory, library use and etc. ?Package Content Customer Service?You get one viniper Portable Table Fan, one USB cable, one user guide, Please write amazon email to us for help if meeting any problem. We will respond within 24-hours. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.