VLF means Extremely Lower Frequency and is identical technology used in detectors created for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Here are 5 explanations why you could possibly pick a VLF more than a PI Disclosure: Many https://forum.bandariklan.com/showthread.php?tid=1096066