VLF stands for Pretty Very low Frequency and is the same know-how Employed in detectors designed for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from three kHz to 70 kHz. Here are five explanations why you could opt for a VLF above a PI https://www.gamersmake.com/fora/viewtopic.php?t=21041&sid=c8e03c56860aec20b35b3749d5229cdf