Youtube: https://www.youtube.com/watch?v=Fnj9v24WddQ

The most capable smart KeyBox K12, Zinc Alloy, Heavy Duty, 

High and low temperature test passed at -40 ℃~60℃, also this is a CE certified product, 

with this keybox your winter holiday stays will get easier and more convenient. 

If you are planning to have a tour in the Northern Europe countries your Airbnb owners will not likely come to you and deal with check-ins but with the keybox your check in could be easier and faster.