1.5in1 Wall Stud Detector: The advanced wall scanner and wooden stud finder offers five scan modes for versatile detection, including 1/2' bolt scan, 1' bolt scan, 11/2' bolt scan, metal scan, and AC scan. With these modes, you can easily locate wood studs, metal studs, beams, metal pipes, rebar, and live AC lines hidden behind walls, floors, and ceilings. 2.Automatic Calibration and Easy Operation: Simply turn on the stud finder and place it on the wall to complete the calibration process. The stud finder flashes and beeps as soon as it detects the edge of a bolt. This automatic calibration function ensures maximum reliability and accuracy. 3.LCD Display and Sound Reminder: Equipped with a large LCD display and sound alerts, this magnetic stud finder guarantees precise detection of object positions. The display shows the bolt center and exact location, saving you time during your projects. 4. Compatible: This lightweight and durable stud finder sensor is designed for convenience. It can assist in various home projects, such as mounting TVs, bathroom cabinets, photo frames, and garage shelves.