VLF stands for Incredibly Very low Frequency and is similar engineering used in detectors designed for coins, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Allow me to share 5 main reasons why you could decide on a VLF over http://classichonda.phorum.pl/viewtopic.php?p=178966#178966