Faithfull 3-in-1 Detector is for use detecting and locating wooden studs, metal studs, and live wires. The electronic detector prevents accidental drilling of cables and pipes, clearly indicating concealed objects through LED and buzzer warnings. Faithfull 3-in-1 Detector is the perfect companion to any work which involves locating pipes, cables, electrical boxes, exhaust vents, conduit, rebar and ducting, or drilling ceilings, floors, and walls. A 9V alkaline battery is included.