5 in 1 Function The wall detector has 5 different scanning modes. Three types of stud mode scan wooden beams and joists in walls up to 13mm, 25mm, and 38mm thick. Metal mode detects metal up to 60mm deep. AC Scan mode detects unshielded live electrical wires up to 51mm deep. Efficient and Accurate This power cable finder is equipped with a highly efficient upgraded sensor. The LED screen indicator provides a clear direction and exact position of the target when moving the wall scanner along a wall. A beep sound alerts you when an object is detected. You can quickly locate wood, metal studs, rebar, and live electrical wires in walls, floors, and ceilings. Easy Calibration One-touch selection for on/off/mode and a calibration button make the stud finder easy to calibrate and use. In stud mode, calibrate directly on the wall. In metal and AC mode, calibrate in the air. Ensure calibration is performed in an area free of nearby studs or AC wires. Multiple Uses This power cable finder is suitable for professional applications such as construction and industrial work, as well as DIY home projects. It helps prevent drilling into metal or live wires when mounting TVs, hanging artwork, installing light fixtures, or drilling into walls, floors, or ceilings. Customer Service The wall-mounted metal detector comes with 1 x 9V battery. For any inquiries, contact customer support for assistance.