VLF stands for Very Small Frequency and is similar engineering Employed in detectors designed for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from three kHz to 70 kHz. Here are 5 explanation why you could pick a VLF over a PI Additionally, as being http://nec.phorum.pl/viewtopic.php?p=746184#746184