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I can't see you, but I can see the light change in the room.
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It depends on what you are doing indoors, if there is a light in the room and suddenly the light is blocked, he knows that someone is watching him.
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No, you can't see the inside from the outside.
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The cat's eye can only look from the inside out, and people on the outside can't see inside, so there is no need to worry, but it has light and can know that there are people in the house.
Do you want to see if there's anyone in your house? Why look inside from the outside of a cat's eye?
What can be seen is only very deformed, and it needs to be corrected before the normal angle of view can be produced.
Is the cat's eye doorbell integrated, or separate!! The one is expensive, about 20 yuan on the market, and about 5 yuan for the split one.
It's used to ring the doorbell!!
Directly in the building materials market to find the anti-theft door sellers on it, the rest of the things to let the anti-theft door manufacturers do well, the brand uses Longjia, Panpan, Xinduo and so on are good.