The wall detector features large LCD display, ergonomic design, and multi-sense technology for accurate detection of both metal and wooden studs.This Multi-scanner stud finder uses electronic signals to quickly locate edges and center of metal, studs, joists, pipes, live AC wire behind walls, floors and ceilings. Long Press Mode Button to turn on the tool, short press Mode Button to switch to the desired mode;Short press the detection mode button, and wait for automatic calibration.Step 2: Scanning walls. Move the scanner slowly along the wall. Do not lift the instrument or apply additional pressure;Note: If you shake or lift the instrument carelessly, you need to recalibrate it.Step 3: Find the center of the target. The progress bar on the screen changes with the distance of the object;When the signal is full, the indicator light flashes and a ticking sound is emitted, meaning that the center of the object has been found. Specification: Product name: 5 in 1 stud finder wall scanner. Display: LED LCD green backlight screen. Product size: 180*80*35mm. Material: ABS/TPE. Battery specification: 1*9V dry battery (does not include). Package list:1 x Stud Finder Wall Scanner. Note: 1. Due to manual measurement, stud finder wall scanner may be some errors in size and weight. 2. Due to the difference of different monitors, stud finder wall scanner may be a little color difference.