I see the rfid sachets for car keys, but do keys need to be fully encapsulated to block the signal from just 1 or 2 sides? For example could the wall the keys are stored on have something installed for blocking if the driveway is behind said wall?
In: Technology
A brick wall has lots of gaps in the structure it is basically a solid sponge and radio frequencies can pass through it if the wall is small enough, basically why wifi will work in all rooms in a house. https://youtu.be/G19cVJfy24A
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