VLF stands for Incredibly Low Frequency and is similar technology Utilized in detectors constructed for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Listed below are five reasons why you would possibly pick a VLF more than a PI http://ostrza-avalon.phorum.pl/viewtopic.php?p=404315#404315