"STUDSENSOR PRO" SENSORFinds both wood and metal studs.Select between 3/4" scan depth and patented 1 1/2" DeepScan mode.Patented SpotLite Pointing System, audio signal, and LEDs indicate stud edges.Patented TruCal instant calibration.Recessed LEDs for durability.WireWarning® lets you know you"re working safe.Continuously detects and warns of hot AC wires.Detects the presence of unshielded, hot AC wires in all modes for safety.Locates standard household 120/240V AC wiring.Find wires in plastic conduit or Romex cableExclusive SpotLite® Pointing System shines a bright beam of light over stud edges.New updated industrial design.Made tough to withstand daily jobsite use.Non-marring wall pads.9V battery includedDimensions: 6.07" H x 2.7" W x 1.18" D Weight: 5.7 oz