VLF means Incredibly Very low Frequency and is identical technologies Employed in detectors crafted for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Allow me to share five explanations why you might go with a VLF over a PI https://www.tapatalk.com/groups/lovinworld/viewtopic.php?f=66&t=14245&from_new_topic=1