So I have this camera KC120 and KC200 and I was wondering what is the range of the cameras?

I have the following setup:

KC200

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(1 floor high)

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   -------------(5m-6m)---------------------Router--------------------(5m-6m)--------------------KC120

With the KC120 (it is in another room) I don't have any problems, but with KC200 it is outside and even though the led is green sometimes when it's cold it gets red (is temperature a problem? it was -2° C) and stops working. So I would say that currently is 20% of the time works and 80% doesn't work.

If I move KC120 further with 2m it starts to behave like the KC200. 

With other devices like phones or laptops I can be even 10m and one floor distance and still have a strong signal.