VLF means Extremely Reduced Frequency and is the same technologies Employed in detectors built for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Here are five explanations why you could choose a VLF over a PI 2nd, Guantee that https://www.fw-follow.com/forum/topic/78632/metal-detector-tips-for-desert-exploration