VLF means Very Very low Frequency and is similar engineering used in detectors developed for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from three kHz to 70 kHz. Here are 5 explanations why you may perhaps select a VLF above a PI Right after https://www.authoraevia.com/forum/topic/gold-detector-adventures-in-forgotten-mines/#postid-2469115