VLF means Very Small Frequency and is the same know-how Employed in detectors constructed for cash, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from 3 kHz to 70 kHz. Allow me to share 5 reasons why you may choose a VLF above a PI Hence, https://www.ttlxshipping.com/forum/topic/279056/gold-detector-adventures-at-twilight