VLF means Pretty Low Frequency and is identical technological know-how used in detectors designed for cash, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Listed below are five explanation why you would possibly pick a VLF above a PI The http://gzew.phorum.pl/viewtopic.php?p=615707#615707