VLF stands for Really Very low Frequency and is identical know-how Employed in detectors created for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Here i will discuss five explanation why you may select a VLF around a PI http://taniecirlandzki.phorum.pl/viewtopic.php?p=117860#117860