Feature: 1. ACCURATE DETECTION: Stud detector uses the most sensitive smart microprocessor chip to accurately and quickly detect wood, pipes, metal and AC wires concealed in walls, floors and ceilings 2. FOR VARIOUS PEOPLE: 5 in 1 detector make your home overhaul easier, whether you're a professional, homeowner or DIY lover 3. LOCATE CENTER AND EDGE: Wall scanner with 5 scan modes for locating the center and edge of wood, beams, joists, metal or deeply buried objects 4. BACKLIT LCD DISPLAY: The stud finder has an LCD display and audible warnings. A signal bar on the LCD display alerts you to the distance and direction of approaching objects and beeps to determine the location. This LCD display is also backlit, providing a clear display even in low light conditions 5. AVOID DANGERS IN INSTALL: Can work on slats, wallpaper, wood floors, acoustic ceilings, painted walls and more. Avoid your dangers when installing TVs, cabinets, garage racks, etc. Specification: Item Type: Stud Finder Wall Scanner Product Material: ABS Product Size: Approx. 152 x 62 x 28mm / 5.98 x 2.44 x 1.1in Battery: 6F22 Alkaline battery 9V(not include) Purpose: Quickly locate wood, metal and AC wires concealed in house wall, floors and ceilings. Can work on slats, wallpaper, wood floors, acoustic ceilings, painted wall and more. Avoid your dangers when installing TVs, cabinets, garage racks, etc.. Package List: 1 x Stud Finder Wall Scanner1 x User Manual