Selwynn came closer and took the metal strip, and it was this metal strip that blocked the Mikels detector. You must know the Mikels detector was even more advanced than the ones currently on the market; even military strength signals could be picked up.
Selwynn pulled back and observed the position where the pinhole camera was placed and found that it was inconspicuous enough that without special knowledge, it would be hard to know it was there. He glanced at Anson faintly, "How did you find out it was there?"
Anson tapped his temple and smiled casually, "Intuition. In addition, the board where it was hidden behind was different from the others around, and the edges protruded slightly from the wall."
Sewlynn glanced at the walls stained from all sorts of substances throughout the years, and it was hard to see past the grime. It was hard to imagine that from this, Anson managed to find the discrepancy.