VLF stands for Incredibly Very low Frequency and is the same engineering Employed in detectors crafted for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed here are 5 main reasons why you may opt for a VLF in http://nec.phorum.pl/viewtopic.php?p=752554#752554