Four for about $10 and they've been working on that value for money. All four showed different temperatures and humidity levels when left side by side. The temperature was better than the humidity found all over the map. However, they were reasonably functional - a better product could have been bought from time to time.
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
Xiaomi Mijia Temperature And Humidity Electronic Watch, white
50 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
Stay Cool With COMFYHOME 3-In-1 Portable Air Conditioner - Efficient Evaporative Air Cooler For Home And Office
11 Review
COMFYHOME 3 IN 1 Portable Evaporative Air Cooler - 60°Oscillation, 12H Timer & Remote, Windowless Room AC For Bedroom Home Office
11 Review
🥛 Electrolux EACS-12HG2/N3 Split System Air Conditioner with Milk Cooling Feature
12 Review