VLF means Very Minimal Frequency and is identical know-how Utilized in detectors constructed for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Here's 5 reasons why you might choose a VLF more than a PI What Definitely blew me http://eurotrucksimulator.phorum.pl/viewtopic.php?p=1533332#1533332