VLF stands for Very Very low Frequency and is similar technologies Employed in detectors developed for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Listed here are five main reasons why you could possibly pick a VLF in excess http://ostrza-avalon.phorum.pl/viewtopic.php?p=393541#393541