Auto Calibration - Provides maximum reliability and accuracy through wall scanner auto calibration. - Easy to read LCD display. In stud/deep mode, place it on the wall you want to test for calibration; in AC/metal mode, place it in the breath for calibration. Sensor Technology - The stud detector wall scanner uses advanced sensor technology to accurately and quickly locate studs, wood, metal, and AC wires. LCD Display - When a target is found, the LCD display will indicate the direction and the strength of the beeping sound to tell you whether you are approaching the target. - Fast detection greatly saves the user's time. Quick Location - Wall stud finder can quickly and easily locate the wall, floors and ceilings behind wood metal stud beams, metal pipe threads and live AC wires. Scope of Application - Stud detectors quickly locate wood, metal and AC wires concealed in the wall, floors and ceilings of houses. - This is a drilling tool that can help you avoid potentially serious problems when installing TVs, cabinets, etc. Use scenarios - Mounting a flat screen TV on a wall: locate studs for secure mounting and identify live wires to prevent damage or shocks. - Installing kitchen cabinets or shelving: find stud locations and avoid hidden pipes or wiring. - Renovation or DIY drilling: identify wood and metal studs and live circuits behind walls, floors, or ceilings before drilling.