Vaikby6-Pack Mini Digital Thermometer Hygrometer, Indoor Humidity Monitor, Temperature Humidity Gauge Meter with Fahrenheit (℉) for Humidors, Greenhouse, Garden, Cellar, Closet, Fridge

Perfect for measuring humidity and temp. Use them in humidor and other humidity sensitive areas

Works awesome

For what they cost they’re a good deal, but if you want to be very specific on your temperature and humidity, they all read something different maybe two might match.

These were a great deal. I have a humidor that holds 750 cigars on 5 levels. I have a humidifier that takes care of the entire space so keeping the humidity and temperature are very important. These were a great deal, I used 4 of them to maintain the humidity and temperature. They are accurate and reliable, I can keep all the zones for my cigars.

The picture says it all. Here is the product still in the bag. Please note the rather wide range of values that these little things read -- in the EXACT same setting. They'll do for a ballpark, but if you are looking for any level of real accuracy, I think I'd look elsewhere.That said, they are at least *somewhat* congruent in their readings, and let's face it -- these are cheap as dirt! So, you get what you pay for, and if you are looking for dirt cheap little thermo-hygrometers to ballpark-estimate your conditions, they won't break the bank. Just be aware that they aren't going to give you terribly precise measurements -- at all.

I use them in a greenhouse. They work well and are accurate within one degree or so. A great product if you need to monitor temp and humidity in multiple locations.

If you put all of these next to each other the all read differently. So I’m at a bit of a loss. Your guess is as good as mine! Apparently they can’t be calibrated. So they made it right with me! Good sellers are hard to come by on here. This is why I have updated my review!

I've bought cheap Hygrometers in the past, only to be disappointed that they didn't match with each other. How can I believe any of them? Use the average? Use the ones that match with each other? Anyway, that wasn't the case with these Hygrometers, they agreed with each other and work fine for measuring the relative humidity of my filament for my 3D printer.