Mineoro detects copper, gold, bronze, silver and his alloys. In Mineoro site's is how can you determinate the depth. Is no important if a coin is 1 meter depth, just this is the question: in the case is a valious coin, you don't dig for to unearth this?
From Mineoro's web page:
A empresa "Mineoro"TM, é a única fabricante em toda a Terra de um novo sistema de detecção de metais, especialmente ouro, prata e cobre, através de uma descoberta cientÃ*fica chamada: "Campo Iônico /Electrostático".
In black letters: gold, silver and copper.
If the target is big, you detect from more long distance and the beeps are continuoslly.
Just found bronze piece with Mineoro and anothers experimental machines. Also my black machine pick this. So, is some difficult to know wich kind of target is. There are in consideration the size. Here the sequence:
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