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

It showed up working and I was thrilled with the no fuss, having to do nothing with it for it to work. It came with stickies to hang on my terrarium and with extra batteries! I have had it for a few weeks and it works beautifully! Great purchase!

Works for what I am using it for. (Monitoring 3D printer Filament in storage).

I got a 2 pack of these because my incubator was not displaying the correct humidity. I read all the hit-or-miss reviews and decided to risk it. Yeah, that was a mistake. On one hand, these are closer to the truth than the incubator (which still reads 20% humidity, obviously wrong). On the other hand, the temperatures are wayyyy off. That is pretty dangerous in an egg incubator. I used my instant read thermometer to compare because I was confused why, after two hours, they were still getting drastically different readings. I’m glad I did because it showed that my incubator was NOT running cold (like I thought it was, after using the sensor on the left for a few days), and was actually hotter than it should’ve been. I put this second sensor in to be sure of the temperature before making adjustments, and that’s when I discovered they are radically off. I find this strange because when they sat at my room temperature they displayed properly, but in the incubator they are inconsistent. I don’t have $20 for better sensors, but I’m mad I even wasted $6 on these. Save your money.

Does what it says on the tin. Simple, easy to read, and reasonably accurate.

Works as described. Mine were about 5 degrees off on temperature and humidity. Battery life was meh at about 6 months of 24/7 operation. Decent product for the price. Simple to use and easy to read display.

Guitar humidification accuracy

These work well, are small and unobtrusive, and come with batteries.

Both worked fine and accurate

A good bang for your buck, not exactly lab grade equipment (the two units does not quite agree on either humidity or temperature) but good enough for my purpose - checking if my Swamp Cooler will work.

Alot of reviews show 2 very different readings. That seems to happen when you move them or touch them etc. But if you set them down and leave them for a few minutes they even out because mine are basically identical and work just fine.