General description The 4 in 1 Wall Detector is a versatile tool designed for detecting metal, wood, magnetism, and AC wires in walls, floors, and ceilings. It allows users to quickly and accurately locate nails, screws, rebar, wooden beams, and electrical wires, making it ideal for both professionals and DIY enthusiasts. The device features a large LCD display that provides clear information on the detection mode, depth, signal strength, and battery level. Technical specifications Detection modes: Metal, Wood, Magnetism, AC wires Maximum detection depth for wood and metal studs: 19mm Deep scan maximum locating depth: 38mm Maximum metal detection depth: 60mm Maximum electric cable detection depth: 51mm Power supply: 9V battery Installation Before use, perform a pre-scan calibration by selecting a mode and pressing the scan button until a beep confirms calibration is complete. If the device is shaken or lifted, recalibrate before scanning. Usage Scan the wall to detect materials; the