VLF means Incredibly Low Frequency and is similar technologies Employed in detectors built for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from three kHz to 70 kHz. Listed here are 5 main reasons why you could go with a VLF above a PI Our http://gzew.phorum.pl/viewtopic.php?p=615707#615707