Treva 10 in Portable Desktop Battery Fan 2-Speed with AC Adapter Graphite

Wow... this is a must for me because I need to cool my large old body always! Of course this very versatile fan isn’t an air conditioner nor ‘swamp cooler’ that provides cooled and moisture added air flow. But this is what this fan is: a great portable design with a large diameter for air flow; both wired and battery power options; super quiet constant operation and truly awesome. Years ago I started thinking and then rhetorically asking why there weren’t fans like this available or even existing in this consumer friendly design versus high end expensive rechargeable fans used for many industries. I may have bought the first version of this fan and for sure wrote the first review on Amazon of it. Now several years later I am writing this review with a well improved version of this fan. The true unique and most important selling feature is the ability to use D batteries to power this lightweight yet nice diameter for air flow design. It also is able to fold into a even better smaller size that makes traveling and camping + any place... able to be added to, or by itself provide the so often needed flow of air directly with you. When used with the plug in power cord attached; this fan will provide a constant breeze like air flow that may not make super hot days into something cool or breezy! But it’s the fan and it’s great functions for the other times when it’s not the only device for cooling down that allows this portable fan to be truly appreciated. In the sum; this is the current version of a genius (thank you!) design that is even more brilliant and more powerful than the first!!

Original post: We used this on a three-night camp trip into southern Iowa in August. It made all the difference for getting a good night's sleep. It created enough of a breeze on the low setting to give relief without blowing too hard. On the low setting there wasn't quite enough white noise to cover campground sounds or animals treading about but the high setting did a good job of covering noise. The batteries gave enough weight in the base for it to remain upright all night. We like that it folds up to a very portable size and doesn't take up much room among the camp gear. Update one year and three months after purchase: We returned the original purchase as it was defective and got a replacement without any issues. Very reliable fan. Ended up using it in the bedroom for white noise on the low setting. Folded up, it propped easily into the window. The high setting brought in enough evening air to cool the room for night sleeping and the low setting is perfect white noise. It has run for eight hours a night for 15 months. Other fans we've had tended to develop vibration noises after several months, very annoying and not conducive to falling asleep. Not this one. It sounds and performs the same as the day it came out of the box. The only caveat I have to add is that the covering on the cord separated near the fan body's plug-in point, exposing the little wires within AC adapter cord. It came as a result of the cord bending downward at the connector every night to plug into an outlet below the window. It's beyond repair and needs replacement. We tried a couple of power adapter cords from several electronic devices we have but none worked. I see that a replacement AC adapter cord is available from the manufacturer for $12, about half the price of the unit itself. Based on the performance of the fan, we figure it's worth it. The old cord will go to electronic recyclers. As a precaution, so the same thing doesn't happen again on the new cord, we'll probably wrap some electrician's tape around the first couple of inches at the connection to support and ease the bend in the cord. Overall, it's been a good little fan and worth the purchase. UPDATE FOUR YEARS AFTER PURCHASE: still going! Still using it every single night for white noise. Sometimes it makes a little squealing noise for a couple of seconds but giving it a quick smack makes it stop.

The size and light weight design of this fan is great. I purchased this fan to use in my little camper when boondocking, as it is advertised to run on six D cell batteries. It worked great on A/c power with the adapter plugged in, it was wisper quiet and moved air in two different speeds. But when I installed the six D cell batteries, taking care to properly install them in the correct orientation, then to replace the cover and lock it into place, the fan would not work. My husband removed all the batteries, replaced them in correct orientation, and then locked down the cover, the fan still didn't work. We unlocked the cover, got a flashlight and checked to ensure the batteries were all making direct contact, that the lead battery was directly contacting the metal plate, and verified that both wires were also making contact with the appropriate plates. But unfortunately the fan still would not work. Too bad, as I really like this design and feel that it would have been great in our camper when we aren't connected to A/C power. However, the next morning we woke up to find the fan running! We were able to switch it off and on, low speed and high speed with no issues. We're not sure why it would not run the night before, and have no idea why it started running overnight, but it seems to be working perfectly now. We will keep an eye on the operation of this fan, in case we have any additional issues. We would like to know why it would not operate the night before. That is still concerning.

This is a really good fan

It’s very light weight but worked perfectly on the cruise ship!

Let's talk about hurricanes. Last year, Irma knocked out my electricity for 6 days. It was September in sweltering Florida. No ice. No electricity. No cool air. I had bought an O2Cool fan YEARS ago (it was really cheap then $7,99) for camping. I dragged it down out of the closet and it saved my life! Seriously, saved my life. O2Cool is a great brand and that old fan works SO good. It kept me alive and cool till my electricity came back on. It takes 8 D batteries, so make sure you are stocked up. Hurricane season just started again. I bought this updated O2Cool fan (it's a little different than my old one - lighter weight, but otherwise pretty-much the same. I haven't used it yet because I haven't needed to. But, I tested it out and it works great. I put it back in the box and will hopefully never have to use it. This one came with an A/C cord (my old one didn't), so that's good for when I do have electricity. The fan would be great for camping or a picnic. It's super lightweight and is slim and would travel well. It has 2 speeds - low and high. This is a great little fan. The price $26 was a little high, I thought, but I don't care. When you are sweating to death in Florida with no electricity, the fan is worth it's weight in gold! All good. Highly recommend!

The fan is okay. It fits perfectly in a kitchen window, but the fan blades are too thin to pull air through effectively. Even on the high setting, it is not powerful enough to circulate the air like you need it to when cooking near smoke points. I do appreciate the dual-power options and use them both. Stability is also there whether folded up or laid flat. I would consider this again only at a $10-$15 price point.

I never write reviews, but my goal is to save you the hours I spent researching a good travel fan. I am super picky and over research everything. So when I say, just buy this one, it's after lots of research and trial and error. And I'm getting nothing to write this review. I bought this fan for a 3 week trip to Italy and Europe where I know the AC isn't that great and I need a fan to sleep. I was worried I would bake in the heat, but this worked great to cool the room during the day and I put it right on me at night and it put out plenty of cool air for me. It has a low and high setting. It''s just loud enough for white noise to block out hotel noises and it kept me cool despite the high 80 temps in Europe. YES, it works with a basic outlet adapter that you will need for all of your devices. This is key because some American fans are not compatible with adapters. You can also use it with batteries, but why carry the extra weight? It looks big out of the box so check the dimensions, because it is bigger than 10 inches, BUT, it fit perfectly in my carryon because it folds fairly flat and I just packed my clothes around it. Can't say enough about this fan. LOVE IT. Stop shopping and just get it. Trust me.

This is one of the best portable fans I have had. It simply is amazing and meets its puprpose and is a wonderful traveling fan. The best part is I orderd and got it shipped from US with in week inspite me being in Cochin where normal couriers take ages. I wanted this to be taken with me on my tour to Europe where we are doing quite a bit of home stays in the country side where most homes don't have A/C or fan and in recent years European summers have become hot (temp in Spain was 39 degrees) and i have had bad experiences in the past as well, hence we decided to take a fan. Straight away knew the cheap Chinese fans (already having extremely poor reviews on amazon) would not be enough. After a long search finally found the O2-Cool series of fans. Not only it proved to be extremely useful it was also super light weight and did not add on to our overall weight limit in a bad way. Special mention of the company Ganapathy Global who sold it cheaper then many other sellers but also promptly responded to my email request for delivery within a week as I needed it for my travel and it came ahead of the time they promised. Please note: This product is for travel or to be used in close proximity and recommend using a light weight extension cable than buying the heavy and expensive rechargeable battery's (unless you are camping).

El aparato perfecto cuando deja la luz

Update 21Jun23 -- incredible machine, still going strong all seasons. Battery tip, since Amazon jacked their's so high in price, tried Dollarama's Panasonics, equal to the task and significantly cheaper. Update 14May22 D Size Adapter -- decided to return the adapters (noted below). Only got average four-to-six hours out of the AAs with adapters -- not worth the light weight and hassle changing so often. Get minimum 20 hours with Amazon gold D batteries, gone back to them. Update 25Apr22 -- Holy smokes, still going strong and definitely the best investment ever. Works fabulously with both AC and D Batteries. Recently bought a D Size Adapter that takes one AA battery and it also works great and is just a bit lighter-weight, although don't last as long as Amazon Basics gold D cells but alternative when you run out. (https://www.amazon.ca/gp/product/B076Q6SQM4/ref=ox_sc_saved_title_1?smid=A3P4UZIS42PRQV&psc=1). Now heading into warm weather and after working great through winter to help circulating heat it's now keeping me cool again. BTW, did buy a skinny paint brush to reach through grill to remove gunk from blades. After "brushing", tip and tap on the ground to dispose the gunk. Update 11Mar21 -- This is one of the best purchases I have ever made! It's still working VERY well with both AC and batteries in both cold (circulating heat from my camper van propane Mr. Heater) and hot weather to keep me cool. I can't imagine not having it. I have, however, found one thing that frustrates: it's solid one-piece plastic housing cannot be opened to clean the blades which are very, very dusty after more than two years of pretty much constant use. I've taken to using a 2-inch hair-rather-than-synthetic paint brush to try to clear the outer housing rings as much as possible. Might next try a skinny artist's brush to reach through the rings to the blades. Update 03Jul20 -- amazing device! Working really well still with both AC and batteries. Used all winter to help move the heat around from my propane Mr. Heater, and now the weather is getting hot and humid again so am using it to keep cool. Again, this size is so much better than a 5 or 6 inch fan in a camper. Really, it's absolutely worth the cost. Update 22Oct19 -- still working fantastically! Using it now to help heat flow around the space. One of my best purchases! Original Review 2018 With both power and battery capacity, this is a really good fan. With batteries installed, when you plug in power supply it auto-switches to AC and doesn't run down the batteries. Am using in a camper van, and when I have power it's "FANtastic", and when on batteries it still has very good power. So glad I got this instead of a 5 or 6 inch battery-operated fan; the large 10 inch size gives much more air circulation. The batteries work for around 5-6 days on low running it for 4-6 hours per day. I've found turning off for a couple of hours seems to restore the batteries so they run strong again for at least a half hour before slowing down again. Another thing I noticed is that when I do use on AC power, that also seems to restore the batteries and they run again really well -- don't understand that, but it's a bonus for me.

very good fan for personal use. it has got battery box inside. so it will help you to keep cool during the power cuts.

Es práctico para uso corto , culo una oficina oh cuarto pequeño no es muy ruidoso.