【High Precision Stud Finder】Advanced sensor technology can accurately and quickly locate the AC line in metal, wood, and metal. It is used to detect the center position of metal or wood studs in the wall. In addition, it can detect metal and voltage features in the wall, and whether the wires in the wall are live. Whether you are a professional or a DIY enthusiast, you can find great use in this digital stud finder. 【Easy-to-Read LCD Display】The digital stud finder has a large LCD display with a large beep warning to detect the precise location of objects. When you find the material, the LCD display shows the direction, and the intensity of the beep tells you if you are closer to the target. Fast detection saves users time and effort, making it easier to complete tasks. 【Auto-Correction Function】 When the beep and screen disappear, place the wood stud finder on the wall, open the stud finder, and complete the calibration. Automatic calibration before use provides users with maximum reliability and accuracy. Then, place it on the wall. After picking up the edge of the stud, the wood stud finder will flash and beep. The stud finder is a device used to determine the exact location of framing studs located behind drywall. This multi-scanner stud finder uses electronic signals to quickly locate the edges and center of metal, studs, joists, pipes, and live AC wire behind walls, floors, and ceilings. How to use an electronic stud finder? Step 1: Install the 9v battery (not included in the package) and choose the mode. Step 2: Place the device flat on the wall. Then press and hold the button while keeping the device still until calibration is complete (1-2 seconds). When the calibration is complete, the device will emit a short beep and the display bars will clear. Step 3: While holding the button down, move it along the surface to be scanned. Step 4: When the stud finder detects an object, it will emit a continuous beep and display on the LCD screen. Please note: This stud finder can quickly locate metal, studs, joists, pipes, live AC wire behind all kinds of walls, floors, and ceilings, but except for cement board wall and brick wall, you can use it on popcorn ceilings, plaster walls, textured surfaces, drywall, etc.