The Magnawand features Two switch able locator settings When the toggle switch is placed in position 1 the Magnawand acts like any basic magnetic locator. When the toggle switch is placed in position 2 it activates the TID™ system. In this position a RED Light will appear and a strong solid tone will be heard when the operator is directly over a Valve/Service Box or surveyors marker. If the target found is junk metal or laying on its side a Green Light will flash intermittently and the tone will be weak thus telling the operator not to dig. The TID system will save hours of frustration and un-necessary digging.