VLF means Really Minimal Frequency and is identical engineering used in detectors crafted for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from 3 kHz to 70 kHz. Here are 5 explanations why you may perhaps go with a VLF above a PI Now Permit’s http://lkf.phorum.pl/viewtopic.php?p=53724#53724