... Lead,Tin and Diamond Key Specifications/Special Features:· Application: mineral lode searching, field exploration, archaeological research, treasure ... finding· Detection of underground metal (mineral) position, size, and depth· Pinpoint six kinds of metal mine: copper, silver, gold, lead, tin ... (Au), Silver(Ag),Copper(Cu),Lead(Pb),Tin(Sn) and Diamond Signal ReciverHandheld Receiving Antenna ...