VLF means Very Small Frequency and is identical engineering Utilized in detectors crafted for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Here's 5 explanation why you could possibly select a VLF more than a PI Since the pulses https://www.postfreeclassifiedads.com/thread-114205.htm