MD 20 runs at 300khz to be able to locate small specs of gold such as the gold on the falcon test card. I have actually used it in mines and tailing piles to recuperate lovely native samplings. Silver, Gold, Copper, and so on, etc. Also will inform you if the ore your holding is metal (gold, silver, copper) or iron (fools gold). When made use of in mix with a good metal detector. Your gold hunt can lead you from the river where the flakes and little nuggets are to the significant density of gold ore is to possibly the major outcropping is! call ph show contact info. will certainly not answer e-mails or texts.