Seems pretty accurate and helps keep track of temperature and humidity.

Good value for money and this one works perfectly. The first had a broken charging port, but this one works fine. I wish it ran longer on the battery. I just leave it plugged in as recommended, which makes me wonder why a battery was included at all.

Fairly accurate sensor, very comparable to my others I use. I really enjoy having one of these because it really allows me to set my surroundings exactly how I like.

This little box packs in a ton of features in a small screen. It will quickly tell you humidity, temperature, air quality, and CO2 concentration. Easy to recharge via USB-C port. My main purpose for getting this is to keep it in a kegerator and help identify and small CO2 leaks

I can actually see what this monitor is saying through my tent window. This way I don't have to waste CO2 by opening my door to look at my old CO2 monitor.

Provides you with all the information you need to monitor conditions inside the grow tent. The battery doesn't last long though, so I'd definitely recommend leaving it plugged in.

I did not know how badly I needed this information. Easy to use, easy to understand. Battery lasts all day. Big bright display is easy to see.

like that you can turn off the backlight here. I also like that you can turn off the high CO2 alarm. It uses a USB-C charger, which is a nice addition. The item has been packaged like an apple product and is easy to use.

I used this in my brew room to monitor co2 levels. Amazing how much the values go up when the room is closed off! I am glad to have this so I can keep track of the times it gets very high.

Ordered this for my basement brewery to warn me about CO2 leaks. Temperature read 10F too high for the first few hours, perhaps due to heat generated while charging the battery? In any case, it seems accurate (+/- 1F) now. The CO2 sensor is quite sensitive and seems plenty accurate for my application. It is sensitive enough to detect the CO2 level rising if you stand near it for a couple of minutes and I was surprised how much higher (from ~460 ppm to 650ppm) the concentration rose while I was cooking dinner last night. To test the alarm function I rigged up a one gallon jug, some random tubing and gas connectors, and a syringe of C02. Adding 7-8 milliliters of C02 to the one gallon jug (initially at ~460ppm) bumped the CO2 concentration inside to ~2400ppm, which is well within the margin of error for this setup (one ml CO2 should raise the CO2 concentration of one gallon of air by ~260ppm).

Happy to add this to the other Inkbird products in my brewery.

Addendum:
I have had this now for several days in my (basement) brewery. After venting the CO2 in my pressurized conical fermenter, it was nice to be able to check that the CO2 level was still well within the safe level (~600ppm) and then returned to normal within a few hours. Very happy with the purchase.