VLF means Extremely Very low Frequency and is similar technology used in detectors crafted for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Allow me to share five explanations why you would possibly decide on a VLF above a http://lkf.phorum.pl/viewtopic.php?p=52642#52642