MWF WF 101 III Pro Underground Water Locator Metal DetectorMWF WF 101 III Pro Underground Water Locator Metal Detector Depth: 800 meters. Distance: 2500 meters. WF 101 B with previous generations that issued of this device, which ranked No. 1 among the long range groundwater detection systems over the passage of 11 years from 2008 until 2019 And now it is coming back to you again WF 101 III with professional version (third generation) to keep the rank device No. 1 in the worlds between advanced detection and