VLF stands for Really Low Frequency and is identical engineering Employed in detectors built for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Listed below are 5 explanations why you could opt for a VLF more than a PI http://eurotrucksimulator.phorum.pl/viewtopic.php?p=1533332#1533332