Wide Application: This stud finder can help you detect the center position of the wooden stud in walls made of wooden boards and plasterboard, as well as the position of metal and AC cables, so that you can accurately install TVs and cabinets, drill holes in the wall, etc. 4-in-1 Detection Mode: This stud finder has 4 different modes that can be switched: stud scan, depth mode, metal scan and AC scan. Multifunctional: Stud scan is used to find and locate the center and edge of wooden and metal studs with a depth of 19mm; the maximum positioning depth of depth scan is 38mm; the maximum metal detection depth is 60mm; AC scanning can detect AC cables with a depth of 51mm. Screen Display and Alarm Message: During the detection process, the screen displays the detection mode, signal strength, direction indication, etc. In addition, the intensity of the buzzer varies depending on the distance between you and the target. You can mark the position where the sound is loudest with a marker. And