HALJIA Metal Detector Module 5V Non - Contact Metal Sensing Detection Module Buzzer Adjustable

Feature: Working voltage: DC 5V;Detection distance: 1CM or less.Colour:blue Material:metalThe board size: 60.2*65.2mmRed line: connect to power positive;Black line : connect to power negative;Adjust the potentiometer, let the modules work normally.Used as a metal detector. When metal near, it does make a sound.Packing List:1*5V Metal Detector Module