Mini CO2 Detector, Air Quality Monitor, Stylish and Lightweight CO2 Monitor for Travel Home Indoor,You Can Use Anywhere

I’ve had this product for a year now, and let me tell you, it’s hands down the best portable air quality product out there! Why spend a fortune on some overhyped, expensive brand when this one is *80% less* and performs just as well, if not better?The clip feature is a game-changer—it's super convenient, allowing you to attach it to your purse, bag, or anything else you carry with you.Charging is quick and effortless, which is a lifesaver when you need to top it up before heading out on an impromptu trip or outing. And the best part? The battery lasts for DAYS! I see some complaints about battery life, but honestly, if you’re having trouble, just reach out to the company. They’ll make it right. For me, it consistently lasts around 3 to 5 days, and more often than not, it’s closer to 5 days. This product has truly been a game-changer for me!

not huge on the noises it makes but great for determining air quality when traveling.

I got this a couple days ago and set it up - it seemed like it worked reasonably well. The process for calibrating it is not intuitive, but the instructions walk you through it well enough. It did give readings of some sort (I can't back how accurate they were), but the battery life was awful - barely half an hour of usage before it ran ran down and needed recharging; the screen is also only visible from certain angles, and sitting on my desk is not one of them. Last night I tried to get a reading and it didn't respond; assuming the battery had died, I left it plugged in last night (with the USB cable it came with), and it's still fully dead and nonresponsive.I saw a few reviews with similar experiences of the unit dying, and figured it was sufficiently less expensive that it was worth a shot - now I wish I'd just gone with one of the better ones off the bat; the return process is requiring it to be sent back, so now I have to deal with finding a time to drive somewhere to drop it off. Even it it was still working, I would absolutely NOT buy this again.

I love this CO2 monitor, because it's easy to clip on to my purse or backpack and gives accurate easy to see readings. I have seen it go up and down as a enter a closed car and then let outside air in. The color system is helpful for beginners to understand risk. I have seen it go up to 5,000 ppm at a place! I'm so glad I can see the CO2 levels anywhere I go now. Excellent product for anyone trying to monitor air quality or reduce airborne infections. I ordered this a year ago and its still going strong!

Primarily used for monitoring ventilation and CO2 levels in small interview rooms. The unit performs well and is easy to carry in a bag or purse. The detector quality is high, so the accuracy is good. You must pay attention to calibration, manual gives the best results, and also battery charge as it is qute small. A portable cellphone powerbank would make a good backup for the device (and your cellphone).

Pretty useless because battery only lasts a day after fully charged for hours. So if you plan to use it as a mobile one, please consider other products. The only way to use it is to always keep it in the wiring.

I wanted to believe the iffy reviews were flukes, but this isn't a perfect cheap device. It's a bit buggy.I have an Aranet and just wanted a cheap/easy way to check spaces I'm in throughout the day without bringing that everywhere as it's expensive. I already know what my house is like and how my office is ventilated after using that for a while. Compared to the Aranet, the accuracy is close. As others have noted, it seems to be off on higher readings, but you get the point when it's that high anyway. Arguably, accuracy is a huge point in its favor.So it has worked most of the time; I know that my car gets bad if I recirculate the air, the title bureau office where I do a lot of work errands is well ventilated, etc. The problem is mostly in its reliability & bugginess.Edit: I found a manual online (no idea where I put the actual copy) that says you have to use the USB-C cord it comes with to charge it. No idea which cord that is now, in my drawer of cords. Completely defeats the purpose of using a universal port like USB-C in the first place. Can’t charge it at work unless I bring the cord with me, can’t consolidate cords for travel, etc. I’ve been charging it overnight with an cord already plugged in at my countertop, so apparently it miiiiight work with other cords, but it’s a gamble? Very annoying. Might as well have a proprietary charger.[Original: There's no indication when it's charging or fully charged. It seems you can only charge it when the device is off? which is fine, but you have to turn it on to find out what the battery status is. The battery lasts maybe 2-3 days for me depending on how much I check readings. That's actually great, imo. Charging can take a while, though. I'm still not entirely sure what tricks work best; it didn't seem to charge when I had it hooked up to my portable charger at work but charged fine overnight at a wall charger.]My main issue is that sometimes, even when fully charged, it reads 400ppm no matter what. If I restart it, that usually fixes the issue, but it's iffy. I'm hoping recalibrating might resolve that if it persists, but we'll see. I confess I have no idea where I saved the manual and I haven't checked there to see if the 400ppm reading is indicative of something specific.Otherwise, sometimes you can hold the button for quite a while before it actually responds by turning on or off. Double pressing the button always seems to work for the sound right away, though.Overall, it does what I bought it for most of the time, but I don't have a lot of faith in its longevity. I don't regret purchasing yet, but I'll update this review if needed.

The alarm can be turned off so that’s good! This came with good instructions. Size is reasonable. It seems to work- calibrated it outside. Inside my condo it’s reading 1100ppm. My work place which ramped up fresh air % intake on our hvac system (and wind tunnel flow rate) is reading 750! I only charged it once but it charged fine. Screen is easy to read. Recommend! Edit to add I’ve had this 2 months and it’s still going strong. V. helpful in places like airports to understand where there’s fresher air ..and where it’s not!