Detect concealed materials before making holes in the wall with the high-performing TOUGH MASTER Wall Detector Electronic Stud Finder. It uses an intelligent, upgraded microprocessor chip for the highest sensitivity, rapidly and accurately finding wood pipes, metal, and AC wires hidden in your walls, floors, and ceilings. The detector sensor features five scanning modes: Deep Mode (up to 38mm for wood), Exact Mode (up to 20mm for wood), Ferrous Metal (up to 100mm), Non-Ferrous Metal (Copper, up to 80mm), and AC wires (up to 50mm). Its heavy-duty ABS plastic body is impact-resistant and scratch-resistant, increasing longevity. The TPE rubber covering provides a comfortable, firm grip. This cable detector features a crystal clear, backlit LCD display and audible warnings to alert you of wiring, metals, or wood presence. It comes with a compatible 9-volt dry battery and a carry case for easy storage and portability.