2-Pack Mini Digital Hygrometer Gauge Indoor Thermometer, LCD Monitor Temperature Outdoor Humidity Meter for Humidors Greenhouse Jars Incubators Guitar Case, Display Fahrenheit (℉)

These hygrometers work, but are not accurate at all. The good news is that they tend to be consistently off. They tend to read 5%-7% more than my other hygrometers. So while you can use them to get a general idea of how the humidity levels fluctuate, they aren't going to tell you what the humidity levels are. They're cheap, and as a supplement they're good because they're cheap. But if these are the only hygrometers you'll own- buy something else. See photo for comparison of hygrometers.

These things are totally worthless. I purchased them because of the size to go inside my incubator. I put both of them side by side inside. Both read different temp and different humidity. The temp reads 10 to 15 degrees lower than it actually is (yes, had to put yet another thermometer inside). Who knows about humidity. Not accurate at all and as such have absolutely no use.

I chose this as it was super cheap and came as a 2-pack, I was a bit hesitant as it only had 4 reviews in a short/recent time frame. However, I’ve been pleasantly surprised at how accurate both are to changing temperatures and humidity. I’d highly recommend this product. I’ve added a picture of their size compared to my car key, they don’t have built in magnets or anything but they’re perfect to leave in different rooms on a table or something

I got this to track humidity in an incubator, which it works well for. However, the temperature reading is very incorrect in the incubator. At first I thought I had a problem with my incubator since both meters said the same thing, but another meger confirmed the incubator read was fine. When it is in room air the temperature and humidity are correct, but in the incubator the humidity appears correct, but the temperature read is 96.2F when in reality it is 99.5F. So if you’re getting this for an incubator, I wouldn’t recommend you rely on it for temperature accuracy, but the humidity read is pretty accurate.

I'm using this product to monitor temperature/humidity for indoor peppers I'm starting mid-winter for spring planting. They are small and fit in the corner of 2 cells, so it fits in dome quite well. I use another on the outside of dome to monitor air temperature. Compared to another thermometer, its accurate, so it serves its purpose. It works well for my needs.

I use this i my shop to make sure it doesn't get to hot for the cats. For the price it is great.One drawback is that the humidity is the big numbers and the temp is the small numbers in the right hand top,makes it hard for me to read it and I have to get really close to see it. I still gave a five star review because for the price that is such a small drawback.

For the price, they tell the temperature pretty accurately. As far as I can tell, they do a good job with humidity too. They seem to be off about one degree from another slightly more expensive model I have, so perhaps they're not perfect, but a good price if you just like to know what the temperature is in your office, bedroom, garage, etc.I dropped one and it smashed the screen, making it useless, so be careful with them. Even still, I think I paid about $7 or 8 for the pair, so they were still cheaper than most wanted for one.

Of the two units neither was within +/- 5% as stated. Tested against a freshly calibrated quality (expensive) hydrometer. I'm OK with that as I didn't expect much. I can just compare them to a calibrated unit and do some quick math. However I would expect them to at least display within 5% +/- of each other. Not even close, comparing one to the other Unit #1 was almost 12 degrees off from unit #2 and humidity of #1 was 40% while #2 was at 10%. Pulled the batteries for 12 hours to let them reset and then reinserted and gave them 24 hrs to stabilize with the same results. One also started reading in Celsius but that was corrected after pulling the batteries again. I don't need a very accurate reading for my purpose but I do need them to be fairly accurate between unit to unit from the same batch and that was not possible.