PD6902 Features: -Multi scanner.-Locate studs, metal or AC voltage behind the wall before cutting or nailing.-Combined multi scanner and electrical tester simplifies installation of electrical boxes, switches and outlets.-3 Selectable modes include stud scan, metal scan or AC voltage detection.-Detects metal pipes or objects to a maximum depth of 2.5" through 1/2" drywall.-Scans and locates wood or metal studs at a depth up to 3/4".-Non contact AC voltage detection to a maximum depth of 3.5" through 1/2" drywall.-Built in metal tip for marking stud edge, pipe location or desired mounting point.-Over molded rubber grips. Specifications: -Integrated 3 wire circuit analyzer with GFCI test functionality. Dimensions: -Dimensions: 1.8" H x 5.7" W x 10.6" D.