GER Detect RIVER-F Smart Underground Water Locator - SUMMER SPECIAL!GER Detect RIVER F Smart Underground Water Locator Depth: 500 meters Distance: 3000 square meters RIVER F SMART Long range detecting underground water, artesian wells, and underground springs with its all new design and the first of its kind worldwide. The device has been completely developed into the RIVER F SMART with the addition of more systems and properties with new professional technologies in detecting water sites and sources and their depths