Radar Technology: The stud finder uses Bosch-patented radar technology to detect all object types, including live and non-live cables, water-filled plastic pipes, and magnetic and non-magnetic metal Spot View: Delivers immediate results even when there is little or no space to move the wire detector to scan the wall Three detection settings: Choose from one of three detection settings depending on wall type - drywall, concrete or universal mode if the material is unknown Center Finder: Arrows and a signal strength indicator guide users toward the object; the center finder indicator shows when the joist finder has located the object’s center Dual Power Source: For added flexibility, the stud detector can be used with either a 12 V Li-ion battery or standard AA batteries using the battery adapter