4WDKING Rechargeable Electrical Air Purifying, Reusable Portable Air Purifier with HEPA Filter for Sleeping Outdoor Sports Housework

I turned this on when I stepped out of the car at the airport. I took off the device for security and put it in a zip-lok that I brought just for this purpose. To do that, I disconnected the air tube at the device and tucked the end of the tube inside my mask which stayed on my face. Got through security, stopped and immediately put the device back on, left it on for the entire flight until I was inside my rental car at the other end. When I moved my mask aside to have a cup of coffee and a bite on the plane, I left the mask hanging on one ear so that clean air was still blowing. Do try it on at home and get your setup for how you are going to wear the device. I initially had it slung across my chest, fixed near the top. Once I was on the plane, I found that I was a lot more comfortable with the stretchy belt I'd chosen just wrapped around my middle, up high, like a high-waisted belt. That was super comfortable. Also, this will only run on high for 4-5 hours I believe it is, so I also bought a power brick, brought proper cable, and ran it off the power brick when its own power ran out. The seller has stated in Questions/Answers that it is ok to run it off a power brick. But, there is a limit on the size of a power brick you can bring on an airplane. Check on that limit to make sure they will allow yours in your carry-on. I had way more power than required. I also hung a negative-ion generator from that same belt, next to the device. So I felt very protected. And as I have asthma and can get a bit panicky wearing a mask, this device allowed me to be 100% comfortable and happy with my mask setup. Amazing comfort with cool breeze inside my mask. Last, what convinced me to try this were the videos from the surgical nurse and the dentist (his video is on the original, aluminum version-- but buy this plastic one, it's an improvement). They were 100% right on about the benefits of this device.

This is a great mask. Easy to use and very comfortable.

Caveats Not designed for viral protection . Powered air creates positive pressure that amplifies all face masks fatal flaw, unfiltered exhalation leakage. So wearer gets gobs of filtered air , but increases exposure risk to those around you. We try to mitigate this and minimize leakage with simple modifications that will work to improve any mask. Tighten mask to face with any mask frame, home made bracket frame made from 1/2" garden ties, and most efficent 8-10" cut off nylons panty hose used over entire mask. Close any gaps 3/8 closed cell foam adhesive weather stripping applied to inside edge especially around nose piece. We add standard mask exhaust valve with filter material fixed to inside of valve to provide lower bypass pressure. any mask with exhaust valve should have filter material fixed to inside. Otherwise it is just a virus concentrating and aiming device. All brands claim h13 hepa filter. Some have niosh or china certification print on filters. We add layer of Merv 16 Filti face mask material from filti.com or any of electrostatic melt blown polypropelene available here on amazon on top of hepa filter. Setting aside filter QC issues, non compliant materials , or unseen defect to these tiny hepa filters we consider this an imperative redundancy for viral filtration. It probably brings filtration to N99 level and reduces air flow volume 10-15%. We have been modifying all 4 brands of these for mask intolerant, exercise demand, and high exposure users. There is little functionality difference between brands. The airdog has round shape and also makes a small desk top unit The simple advantages, The models with KN95 mask fit most faces very well. great fresh air source for smoke and pollutants out of box good experience with battery life, component quality, adequate airflow up to moderate exercise. these make a great adjunct without tubing worn around neck blowing filtered cooling air while wearing a normal mask underneath a face shield. All materials except Filti nano filter material available on amazon. an inventive negative/positive electric demand valve would make these a life saver for frontliners who deserve a lot better than a cotton bandana.

This device is a gift from heaven for people who have a hard time breathing through ordinary masks. It works by pulling air in through a 99% HEPA filter piping it into a KN-95 mask and then out through the mask. There are 3 speeds so as you need more air you can increase the speed and airflow. It is not industrial quality but if you care for it the device is reliable and easily recharged via USB. And you can get extra HEPA filters. You can use ANY mask just by cutting out a 1/2" hole and affixing the hose port to the mask. Now comes the down side. The device creates a positive pressure inside the mask. It protects the wearer beautifully. BUT that same pressure may reduce protection for others. Why if the mask is KN-95? It's because the positive pressure has to go somewhere and it has two choices... through the KN-95 mask filter or find a place that is easier to go through like a small opening on the side of the mask. This can cause your unfiltered exhalation to escape the mask. If you socially distance and stay away from people, this should be no problem. if you do not have COVID it is no problem. But if you have COVID and can tolerate a KN-95 mask, that would be more protective of others so long as the mask is well-fitted. I go out once a month and for me this is heaven sent.

I don’t leave a lot of reviews but I had to on this one. I bought this mask/filter fan for cutting grass. I get bad sinus infections. It’s too hot in Bama in the summer to just wear a mask. This thing keeps most of the dust out and actually keeps your face cool. I used it yesterday to bushhog 30 acres. It worked 8hrs straight on medium setting and is still going without a charge. Probably could have ran it on high. Would definitely buy again. I washed out the filter and will do that a few times but I also order extra filters.

マスクが厚く息が吐き辛い。 故に酸素チューブ、呼吸チューブを使える様にし、通常のマスクに替えて使用してます。

It is nice and great for protection and infection control.

I simply can't wear a mask. I just panic. However, a friend told me about this one so I bought it to give it a try. It's the best. The Pump is NOT loud as I read in some reviews. The hose it NOT flimsy as I read in another review. There ARE more than one grommet in the package, as a matter of fact there are 4. and there are plenty of masks too. I'm very happy with this purchase and am so pleased I can wear it without panicking and feeling I have to GET IT OFF ME. I played around with the different levels of air flow and really, level one is enough for me so the battery charge will last lots longer. A big than you to Aurora and a big than you to my friend for suggesting this. It's a game changer for me.

Está muy padre este cubrebocas, si funciona y el ruido que hace el filtro no es tan fuerte aunque tiene 3 velocidades, estaría mas padre si la manguerita pudiera estar mas en medio porque cuando sale el aire lo sientes de un solo lado.

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