VLF stands for Quite Small Frequency and is similar technological know-how used in detectors designed for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed here are 5 explanation why you may choose a VLF above a PI The http://lkf.phorum.pl/viewtopic.php?p=53151&sid=ee41a2acd54159409d5e7f82544d229b#53151