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CORTES TESORO Tesoro Cortes is a metal detector that uses VLF technology and has an operating frequency of 10 KHz. Thanks to the manual adjustment of the ground balance, this metal allows you to search on any type of surface, and also allows the search of gold flakes. Thanks to the digital display 9 segments Cortes provides useful information for both type of metal is on its depth. Through the use of different tones, you can recognize the nature of the metal found in a very simple and intuitive. The search coil is elliptic and is from 9x8