I did the salt calibration trick and they were all up or down within a percentage point. Sufficient for the low price. Buy some batteries. The ones they come with are either old or crappy because they all die within a few months. But I would recommend them.
Precise Humidity Control With Xikar PuroTemp Round Digital Hygrometer, 10-Second Refresh Rate
27 Review
Berrcom JXB-178 Non Contact Infrared Forehead Thermometer: 3 in 1 Fever Check for Kids, Infants, and Adults
62 Review
Wintact Handheld Anemometer Small Digital Vane Wind Speed Meter Gauge, Pocket Air Flow Velocity Tester With Measuring Wind Temperature 14℉ To 113℉ For House HVAC Duct Outdoor Kite Boat Sailing Surfing
18 Review
Room temperature and humidity sensor Aqara Temperature and Humidity Sensor
59 Review
White Senville Dual Zone Mini Split Air Conditioner Heat Pump, 28000 BTU, Alexa Compatible - SENA-30HF/D
21 Review
COMFYHOME 3 IN 1 Portable Evaporative Air Cooler - 60°Oscillation, 12H Timer & Remote, Windowless Room AC For Bedroom Home Office
11 Review
🥶 LG TC09GQR Split System Air Conditioner - White
11 Review
Stay Cool With COMFYHOME 3-In-1 Portable Air Conditioner - Efficient Evaporative Air Cooler For Home And Office
11 Review