Mini Hygrometer Small Digital Thermometer Hygrometer LCD Monitor Indoor Outdoor Humidity Meter Gauge for Car Greenhouse Home Office (10)

Very small but that's not a bad thing as they can be placed anywhere, discreetly. All of them work (have seen a couple of reviews that said they needed to be reset to work) and appear accurate the only slight annoyance is that to see the reading you have to be at the correct angle otherwise the screen is unreadable.All in all, I now know when and where I need to switch the dehumidifier on. Which was the reason I bought them.

These tiny gadgets, seemingly designed to mount in a console, measure humidity within the promised 5% tolerance. Just the job!

very handy size

excellent arrived in small box with 5 individually boxed meters. all from the same batch and all within good tolerance of each other. units are very responsive and a good way to learn about humidity levels through your property. very happy with them.

I initially gave this a bad review, as I thought the temperatures displayed were barmy. Overnight I realised I the big number is humidity level, not temperature. Easy mistake to make, I guess.It turns out the temperature displays are accurate to within a degree or two when checked against a mercury thermometer. I don't know much about humidity levels, but after a reset and about 30 minutes all sat together in the same place to settle, all but one of the 5 units agreed on humidity. The fifth was out by about 5%.If a high degree of accuracy is needed, these are probably not for you, otherwise they're okay for the price.

these are really helpful as they let me know when i need to put the dehumidifier on.they arrived with the batteries already in and on, so im not sure how long they will lastdifficult to read sometimes.. better to place them at eye levelon the whole a good purchase.. lets see how ling they last.

Good value as a pack of five. My issue is they don’t all read the same in the same spot and there are no instructions to reset so I’m unsure of their accuracy

I took the batteries out of the one then the screen went funny and unreadable.Left it a few days and tried again still unreadable.Attempted again and it's working now, feel a little unconfident they will last but they're doing what I need for now.So if you buy these DO NOT REMOVE BATTERIES 😂👍🏻