Review on Mini Digital Electronic Thermometer Hygrometer - 12 Pack for Indoor Monitoring in Humidifiers, Greenhouses, Gardens, Basements by Kristine Carrillo

I bought 12 packs thinking they were almost the same as the rectangular ones I got from another seller before. You are not. These things are more than 10% inaccurate, every single one of them. I expect cheap little hygrometers to be off by a few percent from time to time, I'm not one of those nutcases who think they need to be scientifically accurate. However, more than ten percent is unacceptable and renders the device completely unusable. If you're buying them for cannabis treatment, don't. If I hadn't been skeptical to begin with, I would have had a bunch of moldy meds. Take the rectangular ones, they didn't disappoint.