"STUDSENSOR PRO" SENSOR Finds both wood and metal studs. Select between 3/4" scan depth and patented 1 1/2" Deep - Scan mode. - Lite Pointing System, audio signal, and LEDs indicate stud edges. - Cal instant calibration. Recessed LEDs for durability. - Warning 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 cable Exclusive Spot - Lite 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. Water resistance: Splash and water resistant, not waterproof. Application:Installing plasma and LCD mounts plant hangers, pot racks cabinets and shelves ceiling fans.