"If it is an independent room and you can't find the relevant pipe, you have to take a little more risk, get close enough, and use this to listen to the other party's movements. Find a place where sound waves can effectively propagate vibrations, preferably a glass window. Can you do it?"
"This... shouldn't be a problem. Damn it!" Wu Feng took the microphone-like thing in his hand to his mouth and blew it, and was immediately dizzy by the high-frequency noise transmitted to his ears.
"By the way, why did you put the tracker in such a conspicuous place, instead of hiding it in a relatively hidden place like a fold of clothes? What exactly do you think about it?" Wu Feng asked, shaking his head vigorously, trying to use the action of shaking his head to dispel the dizziness in his head.
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