VLF means Quite Low Frequency and is similar technology Utilized in detectors built for cash, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Here i will discuss 5 explanations why you may choose a VLF in excess of a PI https://divekeeper.com/forums/discussion/technical-diving/gold-detector-for-accurate-gold-detection