Feature:
Working voltage: DC 5V;
Detection distance: 1CM or less.
Colour:blue
Material:metal
The board size: 60.2*65.2mm
Red 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