Metal detector module is used as a metal detector. When metal near, does it make a sound.
Working voltage: DC 5V
Red line: connect to power positive;
Black line : connect to power negative;
Adjust the potentiometer, let the modules work normally.

Technical Details

Product Details

Package Dimensions
Width : 3.39 inch
Height : 0.71 inch
Length : 5.51 inch

Shipping Weight: 0 ounce (View shipping rates and policies)

ASIN : B06XB4NCTF