VLF stands for Extremely Small Frequency and is the same technologies used in detectors built for coins, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Here are five explanations why you could possibly select a VLF in excess of a http://taniecirlandzki.phorum.pl/viewtopic.php?p=120667#120667