VLF means Very Reduced Frequency and is the same know-how Employed in detectors crafted for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from three kHz to 70 kHz. Listed below are 5 reasons why you might opt for a VLF over a PI Besides http://gzew.phorum.pl/viewtopic.php?p=607443#607443