To use the detector, you need to connect a 12 volt power supply to the board. And a coil. A description of how to make a coil and a diagram are included with the board!

Specifications The depth of detection of the coin with sensor Ø280 mm .............. 22 - 25 cm The depth of detection of large objects with sensor Ø280 mm ...... up to 150 cm Power supply .................................................................................. 12-15V Current consumption ...................................................................... 40 - 70 mA The board has reverse polarity protection - and + Video review of the pirate metal detector module - https://youtu.be/pdLAQ4LPK_w