3 Scan Modes: This wood stud finder has 3 scan modes to choose from in stud mode to get the proper thickness of scanning , which can meet different needs. High Accuracy and Stability: This stud finder adopts an upgraded sensor chip, which can sense the change of density behind the wall and help to locate the center and edge of the studs very accurately. The multifunctional design is more powerful, accurate and enduring. Alarm Design: The stud finder wall scanner has an alarm design, keeping you informed of the wall condition and making the handling more accurate. Convenient to Use: This stud detector can clearly identify what objects are inside the wall, more intuitive and accurate. As long as you want to see the inside of the opaque object, you can use it. Wide Use: This wall stud finder quickly locates wood, metal and AC wires concealed in the walls, floors and ceilings of your house, it can work on slats, wallpaper, wood floors, acoustic ceilings, painted walls, etc. Avoiding the dangers you encounter when installing , cabinets, garage racks and more. Power Supply:1 x 9V battery(Not included batteries) Colour:Red Material:ABS Package Contents: 1 * Stud Finder Wall Scanner 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.