C570 Eavesdrop on us

"Brother Fan, in truth, the watch in his hand is a small-sized detector. As long as it is close enough and sensed it, it would tremble, and the closer it is, the greater the vibration."

So that's how it is, Song Fei relied on the detector, then why was he so arrogant just now? I actually thought that Song Fei was really that powerful, with just a casual wave of his hand, he could easily find him