Review on 🌡️ EXTECH Instruments Digit Thermometer: Accurate Temperature Measurement for All Applications by Sam Calderon

I live in São Paulo, Brazil and need a third thermometer/hygrometer to monitor the temperature and humidity in my apartment. The hygrometer doesn't match the other two, the Der Difference is more than 10 percentage points. The so-called "humidity calibration adjustment" does not work. Then, two weeks later, the temperature gauge suddenly jumped to a steady 80 degrees Celsius (the same as 176 degrees Fahrenheit). I tried the "temperature calibration setting" which is also fake: it doesn't work. Too bad: the product is beautiful, but the quality is not built in. I am very disappointed in purchasing this product. Put only one asterisk because NULL is not accepted by the system.