In truth, there is no way to answer such a question. This is because hidden cameras are highly versatile tools and their range of use is only limited by what you need them for. You can use a hidden cam indoors and outdoors.
However, while all hidden cams can be used indoors, but only a selected few can be used outside. To wit, before you install a hidden cam outside your property, you will also need to ascertain that it is suitable for outside use.
The following tips will be able to help out in this regard:
Weather resistance is the most significant factor that will determine the usability of a hidden cam outside. For you to be able to make use of a hidden cam outside your property, it has to be resistant to some of the elements of the weather such as rain, excessive sunlight, strong winds, etc. Otherwise, these elements will destroy the camera, and you'll have lost money.