Review on 🌡️ 12 Mini Digital Temperature Humidity Monitors - LCD Display for Greenhouses, Gardens, Cellars, Fridges, Closets by Maria Botello

I just received it and opened the box. They're all on, which is nice, but I'm wondering if the battery is fresh. Even though I have an LR44 box, it's EASY. The hardest thing to find are accurate hygrometers. As you can see they are all pretty close together. I waited 10 minutes for them to acclimate to my air-conditioned office and compared them to a known humidity-calibrated device. Temperature is off on this unit, as we've suspected for years, but we're leaving it on because of the humidity. I haven't used them in the field yet, but I can't imagine my rating changing. I'll switch them to check the readings and I'll collect and compare them in a week or two. There are at least 2 that don't read properly or at all, but I will contact the seller and hopefully resolve the issue. I wasn't expecting 2 or 3 to actually work and would still be happy because it's hard to find them all working the same way. So this is a summary of why 3 stars it would be 5 if everything worked. try to find a replacement. 75%+ working.