VLF means Really Minimal Frequency and is similar know-how Employed in detectors crafted for cash, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Allow me to share five main reasons why you may decide on a VLF around a PI https://www.tapatalk.com/groups/lovinworld/viewtopic.php?f=66&t=14242&from_new_topic=1