When it's heat it makes it terribly exhausting on behalf of me to sleep in the dead of night, i feel this fan on the low setting is strictly what i would like in my tent to assist ME get to sleep. i've got to mention i'm terribly affected with this tiny fan to date for these reasons: The 18650 Batteries it came with charge in concerning seven hours and runs for about eleven hours once it's on the low speed setting, it conjointly runs for a bit over half dozen hours on the high speed setting. it's therefore quiet that I will barely hear it running on the high speed. If you run it from an external battery bank it solely attracts concerning 250ma on low and 500ma on high therefore betting on the capability of your battery bank you'll quickly determine however long it'll run so if you had a 5000ma/hr battery bank you'll expect about ten hours on the high speed setting and about twenty hours on the low setting. whereas charging there's a bit red semiconductor diode on the rear of the unit, that turns blue once the batteries are totally charged. The package contained the nine in. fan, 2 18650 li-ion reversible batteries, a USB cable that's concerning three feet long, and directions. The fan totally rotates on the stand. I cannot consider anything required in a very transportable fan. giant diameter quality blades, powerful brushless motor move air effectively and quietly, cooling you down and keeping areas well-ventilated and more well-off. 3 speed settings and 360 degrees mobile head for max cooling effectiveness. The durable painted metal housing crafted from industrial grade material. detachable front protect simple improvement. High-quality copper motor, anti-vibration pads, and classic black color create it sturdy to use and appearance exquisite. good for mistreatment in room, drawing area, kitchen, office, school, camping, etc. It's lightweight weight, conductor unless you're charging that takes some hours, quiet and that we used it complete the house. within the room, lounge and even our screened in construction. we have a tendency to lost power for some hours at some point and it absolutely was used for my pup to stay her cool. Charge lasts concerning seven hours and it's super quiet. It's Fantastic.