2 months after purchase, I revise my "note": a star instead of 3 ... I wanted to calibrate the device to determine its absolute error compared to zero by setting one of the three temperature sensors in a food plastic bag immersed in a bucket of ice water (open bag in the upper part to maintain radio contact with the base) and also with an outside temperature of around 0 degrees.
Outcome measured: 4 degrees, instead of 0! How can we dare to call "thermometer" a device that is not capable of measuring 0 to at least 1 degree?
Initial Comment (some days after purchase):
Average precision and apparently no factory calibration: by placing the three temperature sensors and the station side by side and therefore the same place, both outdoors and indoors (to test accuracy over a wide temperature range), we get four different temperatures with gaps ranging from 0.2 to 0.6 degrees Celsius, and gaps of a few percent on the humidity. Which tells the truth ?! Search a reference thermometer for calibration!
Also no way to store the T min and max which is frustrating for a product of this type, it would be better to sell a few euros more than to deprive him of this feature!