VLF stands for Incredibly Reduced Frequency and is similar technological know-how Utilized in detectors designed for coins, jewelry, 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 could go with a VLF more than http://gzew.phorum.pl/viewtopic.php?p=623502#623502