The wall scanner is an electronic stud finder with multi-sense technology that can locate studs / wood / AC wires in multiple places on your wall. Whether you are a professional, a homeowner or a DIY enthusiast, you can find great use in this digital scanner. 4 in 1 Multifunction Deep Detection: The digital wall scanner includes four different scanning modes for wood, beam, joist, metals, AC wires and deeply embedded objects. This stud finder quickly locates wood, metal and AC wires hidden in walls, floors and the ceilings of the house. It can work on different wall surfaces, such as slats, wood floors, acoustic ceilings, painted walls, etc. Helps you to avoid danger when installing TVs, cabinets, garage shelves, etc. Self-calibration and comfortable ergonomic grip to use before testing. Please hold the scan button for 1-2 seconds. Self-calibration provides maximum reliability and accuracy for users. The ergonomic design of this wall stud finder allows it to be fixed from any angle. Excellent backlit display - Features with LCD backlight providing a clear appearance even in low light conditions, this which indicates the detection mode of the center pointing low battery indication, audio indication with beep sound for reminder. Instructions for use: Step 1: choose the mode. 4 modes to choose from. Step 2: Scan the wall. Hold the button down then move the stud finder slowly along the wall. If you shake or lift the scanner accidentally, the device needs to be recalibrated. Step 3: Find the nail location When the signal bar is full and the beep alarm is the strongest, it means you have found the center of an object. Mark it with your pencil. Contents: 1 stud finder (Batteries not included). Note: this does not include others things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item . Due to manual measurement. Please allow deviation. Thank you!