Newest Upgraded Stud Finder FNIRSI stud finder have Newly Designed Positioning Hole which can accurately and quickly mark up edges and center of metal, studs, pipes, live AC wire behind walls, floors. Fast detection saves users time and effort 6in1 DETECTION The wall detector provides users with more detection needs. Exact scan mode locates the center and edges of wood and metal studs up to 0.75 deep; Depth scan mode locates the center and edges of wood and metal studs up to 1.5 deep 6in1 DETECTION NonFerrous Metal scan detects metal Copper up to 3.9 deep; Ferrous Metal scan detects metal Iron up to 4.7 deep; AC scan detects live unshielded AC wires up to 2 deep; Copper wire scan detects copper wire up to 1.6 deep Digital LCD Display Audio Alarm This stud finder comes with LCD display and sound alarm, which can detect the exact location of the objects. TypeC charging mode saves you from the hassle of battery replacement Easy to Use Auto Calibration Easytoread LCD display provide users with comfort and convenience while scanning. The wall detector can be automatically calibrated anywhere on the wall to successfully find the center of studs in one step Widely Use This stud detector quickly locates wood, metal and AC wires hidden in the walls, floors and ceilings of the house. It can work on different wall surfaces, such as lath, wallpaper wood flooring, acoustic ceiling, painted walls, etc