VLF means Very Reduced Frequency and is identical know-how Employed in detectors crafted for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from three kHz to 70 kHz. Listed below are 5 reasons why you would possibly decide on a VLF more than a PI https://www.d-ushop.com/forum/topic/84914/gold-detector-in-caves-and-underground-rivers