Metal Detector Non Contact Metal Induction Detection Module

Overview
LC Metal detector module is used as a metal detector. When metal near, does it make a sound.

Function features
1.Working voltage: DC 5V
2.Board size: 60.2*65.2mm

Hardware introduction and description
The board function description:
Red line: connect to power positive
Black line: connect to power negative
Adjust the potentiometer, let the modules work normally.