Xiaomi MJSXJ09CM Manuel D'utilisation page 11

Precautions
The operating temperature range for this camera is between -10°C and 40°C.
Do not use the camera in environments with temperatures above or below
the specified range.
The camera is a precision electronic product. In order to ensure its normal
operation, do not install the camera in environments with high humidity
levels nor allow water to get into it.
To improve the camera's performance, do not place its lens facing or next to
a reflective surface, such as glass windows or white walls, as this will cause
the image to appear overly bright in areas close to the camera and darker in
areas further away, or cause the camera to produce white images.
Make sure the camera is installed in an area with a strong Wi-Fi signal. Do
not place the camera near the objects that may affect its Wi-Fi signal, such
as metal objects, microwave ovens.
Under normal use of condition, this equipment should be kept a separation
distance of at least 20 cm between the antenna and the body of the user.
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