Product Description 24V Faster Rechargeable: Smartele QF16 battery operate fan has a 15000mAh large-capacity rechargeable lithium-ion battery.The battery powered floor fan includes a 24V AC fast charger making it only takes 2.5 hours to fully charge Best Helper In Power Outage: This rechargeable fan can operate continuously up to 30 hours at the minimum fan speed setting which can keep you cool all day long; it can last a full night at the medium speed.Not afraid of hurricane weather and sudden power outage, blow away the heat for you!By the way,the built-in battery of this portable fan can also charge digital devices such as smartphones through a USB port Low Noise And High Velocity Fan: QF16 electric floor fan structure and unique blade design based on aerodynamic and the powerful brushless DC motor makes this rechargeable floor fan produce a quiet and strong wind(2500CFM high Air-flow),ensuring you stay cool and comfortable without disturbing others Designed For Extreme Outdoor Use: This outdoor fan has a sturdy metal structure, a large carrying handle, and non-slip rubber feet. This rugged and durable outdoor fan is designed to operate in a variety of environments. This rechargeable outdoor fan is IPX4 certified so it is water-resistant and splash-proof. It can withstand occasional sudden showers during outdoor work or camping. This portable battery fan provides you with a reliable and convenient outdoor cooling solution More User Friendly Design: This cordless fan has only one knob which has a variable speed setting that you can control the wind speed and noise level according to your need.5 LED indicators on this rechargeable camping fan which can indicate the remaining power and to remind you to charge the fan in time,avoiding sudden running out of battery.160° angle adjust, choose fan wind angle you want