VLF stands for Really Small Frequency and is the same engineering Employed in detectors developed for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from 3 kHz to 70 kHz. Here are 5 reasons why you may select a VLF about a PI The GPX http://hotel-golebiewski.phorum.pl/viewtopic.php?p=889675#889675