VLF stands for Incredibly Small Frequency and is similar know-how Utilized in detectors created for cash, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed here are 5 explanations why you may perhaps go with a VLF about a PI http://lkf.phorum.pl/viewtopic.php?p=53723#53723