Newest Upgraded Stud Finder - -02 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 effortMULTIFUNCTIONAL DETECTION: -02 wall detector provides users with more detection needs. It has three gears for detecting studs, metals and AC wires, each gear has three sensitivities, and different sensitivities have different detection depthsDetection Depth:The maximum detection depth of the stud detection gear is 1.5'', the maximum detection depth of the metal detection gear is 4.7'', and the maximum detection depth of the AC wire detection gear is 2''Digital LCD Display & Audio Alarm: This stud finder comes with LCD display and sound alarm, which can detect the exact location of the objects. Type-C charging mode saves you from the hassle of battery replacementEasy to Use & Auto Calibration: Easy-to-read 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