VLF means Extremely Lower Frequency and is the same technological innovation Utilized in detectors developed for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Allow me to share 5 explanations why you may select a VLF more than a http://nec.phorum.pl/viewtopic.php?p=763265#763265