Review on 🌡️ Enhanced Ecowitt WH0281 Wireless Indoor Outdoor Thermometer: Digital Temperature Monitoring Solution by Jay Ngo

Near the base unit, all sensors agree with the base unit to within 0.3 degrees Fahrenheit, which is reasonable as their internal JFETs are probably good to 0.1 degrees Fahrenheit. For remote detection of the entrance temperature from the attic, basement and outside. I just wish they had a humidity sensor too. I didn't read the instructions at first and had to remove all the batteries to eliminate radio interference. You set each remote to its own channel with a slide switch before inserting the battery.