BFO detectors are one of several oldest kinds of metal detectors, plus they’re also certainly one of the simplest. They’re not quite good at discriminating amongst differing kinds of metals, so that they’ll beep Each time almost any metal is nearby. That reported, I’m not a specialist Within this area, https://professional-metal-detect91245.look4blog.com/70886771/fascination-about-gold-metal-detector-best