I bought this thermometer with the intention of it outside the window to be mounted, so I can read it from the inside. Unfortunately I have to say that's not a device for such an attachment included. Only on the back of a hole in the shape of a keyhole, to hang, for example on an outer wall (outside because the minimum temperature can be -30). My review refers to the quality of the thermometer; Unfortunately, the most visited of my application is not practical.
