VLF means Really Small Frequency and is identical technology Employed in detectors built for coins, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from 3 kHz to 70 kHz. Listed here are 5 main reasons why you could go with a VLF about a PI Q: https://www.jk-green.com/forum/topic/77025/metal-detector-accessories-you-can%E2%80%99t-ignore