Mini Hygrometer Thermometer 2PCS Mini Digital Humidity Gauge, AikTryee Hygrometer Indoor Humidity Monitor Temperature Humidity Gauge Meter for Greenhouse Garden Cellar Closet Etc

They are very small and lightweight. Seem to be accurate compared to my old glass bulb thermometer. Temperature readings on my 2 units differ by a tenth of a degree. The humidity is displayed with large easy to read numbers while the temperature display is smaller. They are not backlit.

These hydrometer’s are nice, they are compact, easy to read and a value for your money

This 2-pack of combo hygrometer (measures humidity) + thermometer are small, light, and seem to work well (placing them near each other and a 3rd model of a different brand, the readings are not identical but are fairly close, within about 0.5 degrees in temp and 1–2% humidity.They are also a great value, and come with batteries pre-installed (requires 2 each) PLUS comes with 4 spare batteries (one set for each unit).The only downside is the mounting. They DO come with small pieces of double-sided 3M tape (another nice touch), BUT using it to mount them would (a) block the battery compartment on the back and (b) may leave sticky residue on your glass surface. It would be great if they had with a small loop so they could be hung or a small hole to use a suction cup. But if you're OK with that quibble and don't need perfect accuracy, they are a great value and do the job.

I bought these for the temperature moreso than the hygrometer. After having them up for a while, I can think of so many uses for them!I chose these ones because they were cheap enough to get with my remaining amazon credit. I only have a window AC and a small space heater in my bedroom, and I had to keep the temperature above 60F during the cold freeze in order to keep my dwarf hamster from possibly going into torpor (a kind of emergency hibernation due to coldness or illness that can be fatal for the hamster.)As you can see, the temperature reading is very small, and you can't really read it unless you're looking straight at it, but it worked well enough. I was able to calculate during the cold wave the duration I'd have to leave my heater on in order to keep the temperature at 65F. I live in Louisiana so the cold wave didn't last long, but this really saved me a lot of anxiety.I have two in the room on different sides and they always read slightly different temperatures (because one side has a draft) so I'm confident about their accuracy.I also didn't realize how useful knowing the humidity would soon become. Since the humidity is easy to read I've found myself making certain observations... My night sweats are the worst when the humidity is over 80, and my allergies are worst when the humidity is below 60, etc. I've noticed the different ways my body will feel based on the fluctuating humidity. (It is naturally very humid here, but my AC rapidly takes a lot of the humidity out of the air, therefore the wide fluctuations.)I can see the extreme usefulness of these for people keeping animals or plants that require a certain humidity level! One of them sticks on my hamster's tank so I can really imagine anything in a tank etc that needs to be kept humid will benefit from this hygrometer.I even figured out how to keep the temperature in both sides of my room slightly different so that I can be cooler while my hamster is warmer.

Very Affordable and accurate digital hydrometer. Very compact and convenient to keep in you humidors. I initially only bought 2. Since then, I have bought 10 more. They are small and very accurate. I mainly use them to verify my analog gauge and my built in digital hydrometer. You can use this in a stationary humidor or a travel humidor…. And for the price you can always have extra. I have had this for about 6 months and I have not had to change any of the batteries ! I highly recommend this product.

Edit: One of the two now reads 10 degrees higher than the other, initially it was 2 degrees off. Lowered rating as they've only been in use a week.Out of the package these read 2 degrees different and continue to do so. Not sure which is right but in reading review after review on darn near every multipack hydrometer option Amazon offers I believe this is kind of the way it goes. Every pack I looked into had 8-10% 3 star ratings centered around the lack of calibration capabilities and variences between products so I knew it was a possibility. I looked at the options that I could calibrate and the price per unit made it unreasonable for me. Because the varience range is acceptable for me I went with the cheaper option and the fast delivery. I have no trouble reading the display and apprechiate the large number.These came running (no off switch) but they also came with extra batteries. I'd much rather they had some sort of strip to keep the batteries from running, then they could keep the extra batteries and I wouldn't have to feel guilty over the waste and environmental damage.

This Mini Hygrometer Thermometer is worth the price! You get 2 in the package. Its compact size makes it incredibly convenient to place anywhere. The display is clear and easy to read, showing both temperature and humidity levels accurately. It's perfect for monitoring indoor climate conditions, especially in small spaces like my cigar humidors. The setup is a breeze, and it starts working right out of the box. Highly recommended for anyone needing a reliable and portable hygrometer thermometer!