VLF means Pretty Reduced Frequency and is identical technological know-how used in detectors designed for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Listed here are 5 reasons why you could possibly select a VLF around a PI Furthermore, http://inquisnower.phorum.pl/viewtopic.php?p=750271#750271