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

I've tried uploading a photo about 10 times but Revain keeps crashing when I try. Don't waste money on them. They were delivered today and they only ship for. the whole time. Nothing to keep the batteries disabled or anything like that. 3 out of 4 were on and the other was DOA. I'm not sure if it's the batteries or if they're broken, but either way I don't care. The 3 included are not compatible with each other. I put all 4 on the counter in my kitchen for a few hours and one reads 33% humidity and 64.7 degrees Fahrenheit, the second 32%/67.6F and the third 73%/77.0F. They all sat next to each other in the same place. They should be more closely coordinated. Return these as soon as possible.