VLF means Extremely Very low Frequency and is the same technological know-how Utilized in detectors built for cash, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed below are 5 explanations why you could go with a VLF around a http://lkf.phorum.pl/viewtopic.php?p=53151&sid=ee41a2acd54159409d5e7f82544d229b#53151