General description This 4-in-1 Wall Detector is designed for versatile applications, allowing you to accurately locate wooden studs, metal objects, and AC wires within walls. It is an essential tool for home improvement projects, ensuring precise installations of TVs, cabinets, and other fixtures. Technical specifications Detection Modes: Stud scan, Depth mode, Metal scan, AC scan Wooden and metal stud detection depth: 19mm Maximum positioning depth for depth scan: 38mm Maximum metal detection depth: 60mm AC cable detection depth: 51mm Usage Calibrate the detector before each scan by selecting the mode and pressing the scan button. Calibration is complete when the dim bar disappears and a beep sounds. In metal/AC mode, hold the detector in the air for calibration. During detection, the screen displays the mode, signal strength, and direction indication. The buzzer's intensity varies based on the distance to the target, allowing you to mark the loudest point.