4WDKING Rechargeable Electric Air Purifying, Reusable Portable Air Purifier

Just received this and charged it, and letting it blow out for an hour to remove plastic vapors from the hose like the instructions say. (It does smell very plastic/chemical at first.) The airflow rate feels good and I don't feel any leaks from the case or hose. It's not loud at all, a very slight motor sound with a little more air sound. I can tell it's on if I listen for it, but it's not intrusive. Case is actual metal, seems strong, and weighs much less than I was expecting it to from the appearance, slightly lighter than my TV remote with batteries in it. It doesn't come with a charger but the port is micro-USB, so compatible chargers should be plentiful. The two screws holding the front plate on are very tight though, made removing the cover to take off the plastic shipping barrier from the battery difficult. It's not something I'll need to open often given the estimated filter life, and they may be looser now, but I'm concerned they may not last. I don't think the threads are stripping but the Phillips heads are a bit worn after just one time. I may replace them with flathead slots to make opening it easier. The on button is a bit sensitive and nearly flush with the surface, just something to remember when grabbing the unit to check that you didn't turn it on or off or change the blower speed by accident. If they make a version 2, a raised ridge around the button to prevent accidental presses would be a suggestion. Will update after getting a chance to actually use it, but so far so good. The masks it came with seem to be good quality KN-95. Since it's a powered air feed system blowing clean air inside rather than requiring you to suck air in through the mask material by lung power, they should clog less often than the same masks used as an unpowered KN-95. Fit will be important to protect others though, if they don't sit well on your face there could be some leakage of your breath. Not much else to say about them. The hoses are soft but seem pretty resistant to kinking. They are easy to get on and off the connectors. They're an unusual size, the seller answered a question with the exact dimensions previously. I was hoping they'd be the same diameter as a CPAP hose but they are not, they're smaller.I don't know what their lifespan is yet but replacement hoses are available from the seller and not expensive. I would like to get some more replacement connectors too but haven't found them yet. It's not clear from the item page, but one of the connectors is for joining the long and short hose into a longer single hose, and the other is for attaching the hose to the mask. The mask adapter seems to rely on the hole in the mask being slightly smaller than the connector so it stays tight. It won't and can't fall off, it just could leave a gap and leak if you're not careful about cutting. One mask is pre-cut and the others are not. A little sticker is included to trace the hole size around. Besides the screws, the main issue so far is the instruction manual. The English isn't bad, and it gives some good tips I wouldn't have thought of (like keep it in a pocket if you use it in really cold weather or it will feed you unpleasantly cold air, and tie a cloth over it to extend the HEPA filter life in dirty environments), but it doesn't explain a lot of common things, like how long to charge, or what the 3 LEDs on top mean when they glow or blink in certain colors. All three blink red when charging, and glow solid at what I'm guessing to be full charge. Charging didn't take long but I don't know how empty it was fresh out of the box. They don't seem to count down to full charge by blinking or glowing separately, they just all blink and then all glow solid. When running two of them are green, and one is orange (seems to be a mix of red and green). There's no change in them at different fan speeds. Maybe they're indicating the remaining battery level but I haven't gotten it down past the first third yet? Anyway, will update later, but found this interesting enough to write a review of what I've seen of it so far.

My cousin has a moldy car and for various reasons I have to drive that car 1 day a week. The 4WDK8NG has saved me. It filters the mold - I can breathe, have no coughing during or after the ride. I used to be afraid every week but now drivingnte car is NO PROBLEM. My cousin thinks I'm being silly but I think this personal HEPA filter is a life saver. Get it!

Not completely satisfied. Easy flow is better than this one, is very sad for me to say this. I need a product like this one because my porrable Oxygen Concentrator is too heavy for me and even do not have HEPA filter.

My life depends on the clean air I breathe!!! I saw this and had to buy one. It is my opinion that this tiny yet simple device could possibly mitigate your chances of picking up the dreaded COVID 19 Virus. YES! We must all be diligent, wash our hands, not touch our face and adhere to social distancing practices but an extra precaution would not hurt. How about breathing air that is run through a HEPA filter? This is such a simple concept. A box, a filter, a fan, a battery and switch, and a supply tube. So simple and self-contained and it could possibly be a live saver. I like it because I am not constantly re-breathing what is inside my mask. This device introduces FRESH FILTERED AIR directly into the mask. One thing I like is the fact my glasses do not get steamed up. As I mentioned before my masks don't start smelling bad so soon because it is not so damp and the other good point is you are not breathing back in the carbon monoxide you are exhaling. Please note!!! This mask may be an added step of protection for you but it could be harmful to others. Due to the positive airflow inside the mask incoming air forces out some of the sir you exhale. Also, have you ever sneezed or coughed inside your mask? This can affect other people around you. This mask is really only helpful to you. Note: My HEPA cartridge had a slight chemical odor when I first turned it on. I ran it a few cycles before wearing it.

Works well. I modified it in two ways. I made a 1" wide nylon strap at ACE with a clip in buckle to make it practical to wear around my waist. I got a non-rebreathing oxygen mask and removed the main O2 fitting. (Mountain Medical, $2.80 per mask plus shipping.) I also put a piece of tape over the right side vent holes. This works. The silicon tube fits perfectly into the main O2 fitting in front. This mask is comfortable to wear for a couple hours at the range. People can see your face through it, and you don't have creases dug into your face like the poly-masks that comes with this unit. The elastic strap for the O2 mask isn't perfect, but it works well enough. The filter definitely is working. 2 sessions of a couple hours and it's visibly darkened in the center of the HEPA filter. This mask works with my range eyegear. It's comfortable.

I am impressed with how much air the little device puts out!

really happy with this. plugged it into a n95 mask and it was a huge difference in a really low crawlspace.

Excellent product. Fast delivery.

Like the size and weight of this air purifier in comparison to another I bought ( was bigger , the on/off button broke, was a bit more expensive, the filter worked though )however it does not properly filter out scents. I’m going to try cutting an alternate filter material to replace the one it came with in hopes that that’ll work.

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.

جيده لفترات قصيره فقط