Ferrous
This includes many iron targets such as nails, screws, bolts, and some large iron objects like horseshoes.
Non-ferrous with Weak Conductivity
This includes US nickels, rings, and small jewelry but also includes many eliminated items, such as tin foil, pull tabs, screw caps, and bottle caps.
Non-ferrous with Strong Conductivity
This includes most copper and silver coins, as well as modern clad coins.
The smart DISC button helps you eliminate unwanted metal detection. After turning on the metal detector, all three categories of metal targets are enabled, which means that it will detect all metal targets.
Press the DISC button once to eliminate ferrous (iron) targets.
Press the DISC button again, and it eliminates non-ferrous targets with weak conductivity.
By pressing the DISC button three times, the detector will return to the default state, and it will detect all metals.