VLF means Really Lower Frequency and is similar technological know-how Utilized in detectors constructed for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed below are 5 explanation why you could possibly select a VLF above a PI The http://hotel-golebiewski.phorum.pl/viewtopic.php?p=882174#882174