This case is only for the thermo-hygrometer 'SwitchBot MeterTH S1'(Amazon's best seller).
It can be used in bathrooms and other places where some water drops may occur.
Attach the case to the ceiling by inner magnet or double-sided tape. 

MeterTH has sensor on the top center. The air trough the case top and sensor can keep accurate records of temperature and humidity.

Print setting : non support, 0.2 height layer, if insert magnets, stop before the last layer.