General description This 4 in 1 Wall Detector is a versatile tool designed for detecting wood studs, metal, and AC wires within walls. It features an LCD display for easy reading and offers multiple detection modes to assist in various home improvement tasks such as installing TVs and cabinets or drilling holes accurately. Technical specifications Detection Modes: Stud scanning, deep mode, metal scanning, AC scanning Wood and metal stud detection depth: 19 mm Deep scanning maximum depth: 38 mm Metal detection maximum depth: 60 mm AC wire detection maximum depth: 51 mm Usage Calibrate the detector before each scan by selecting the mode and pressing the scan button. During detection, the display shows the mode, signal strength, and direction. Use the buzzer sound to mark the position of the target when the sound is loudest.