VLF stands for Incredibly Reduced Frequency and is similar know-how Utilized in detectors designed for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Here's five explanation why you might opt for a VLF over a PI Therefore, the capabilities http://illuminandi.phorum.pl/viewtopic.php?p=570649#570649