1. Precise and Fast: The stud detector utilizes an intelligent microprocessor chip with sensitivity to accurately and quickly detect hidden wood, pipes, metal, and AC cables in walls. 2. 5in1 Multifunctional Detection: 5 scanning modes, including ½inch, 1inch, and 1½inch modes, to locate the center and edges of wood, beams, joists, metal, or deeply buried objects; Metal Scan Mode: Detection of magnetic metal can reach up to 3.2 inches (80 mm) in depth, AC Mode: 2 inches (51 mm) deep. 3. Automatic Calibration, Easy to Use: Turn on the stud finder, place it flat against the wall, press the scan button, and it's ready for calibration. The intelligent microsensor chip flashes and beeps when hidden wood, metal, and AC wiring are detected. 4. LCD Display and Audible Alert: The signal bar on the LCD display shows the distance and direction of approaching objects and beeps to pinpoint the location. This LCD display also has a backlight for clear visibility even in lowlight conditions.