5 in 1 FunctionThe wall detector has 5 different scanning modes. Three types of stud mode scans 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.<br> Efficient and AccurateThis power cable finder is equipped with a highly efficient upgraded sensor, l The LED screen indicator gives you a clear direction and exact position of the target when you move this wall scanner along a wall, a beep sound lets you know the object has been found. You can quickly locate wood, metal studs, rebar, as well as live electrical wires in walls, floors and behind ceilings.<br> Easy CalibrationOne touch selection on/off/mode and a calibration button make the stud finder very easy to calibrate and use. In stud mode, just calibrate on the wall, in metal and AC mode, please calibrate in air. Please make sure you are calibrating in a place where there are no studs or AC wires nearby.<br> Multiple UsesThis power cable finder is not only suitable for professional uses such as construction and industry, but also makes DIY at home easier and safer. When you need to drill holes in the wall, hang art, mount a TV, or install a light fixture in the ceiling, it will help you avoid drilling into metal and AC wires in the wall.<br> ><br> Customer ServiceThe wall mounted metal detector comes with 1 x 9V battery, you don't need to buy it separately. If you have any questions, please contact us and we will provide you with satisfactory service.