VLF means Quite Minimal Frequency and is similar technology Utilized in detectors designed for cash, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Here are 5 main reasons why you may select a VLF around a PI The subsequent metal http://taniecirlandzki.phorum.pl/viewtopic.php?p=120670#120670