Accurate and Rapid: The stud finder adopts an intelligent micro-sensor chip with the highest sensitivity which can accurately and quickly find edges and center of metal, studs, joists, pipes, live AC wire behind walls, floors and ceilings. Fast detection saves users time and effort, making the task completion easier. No matter professionals, homeowner and DIY enthusiasts, it must be an ultimate choice. 5 in 1 Multi-function Detection: The upgraded 5-in-1 mode provides users with more detection needs. 1/2 inch scan mode locates the center and edges of wood and metal studs up to 1/2 inch deep; medium scan locates the center and edges of wood and metal studs up to 1 inch deep; Deep scan locates the center and edges of wood and metal studs up to 1.5inch deep; Metal scan detects metal (Ferrous and Non-Ferrous Metal) up to 2.36 inch deep; AC scan detects live unshielded AC wires up to 2 inches deep. Digital LCD Display & Audio Alarm: This stud finder comes with large LCD display and sound alarm, which can detect the exact location of the objects. When find the objects, the LCD display will indicate the direction and the intensity of beeping tells whether you are more close to the target. This LCD also features back-lit function which can provides a clear appearance even in low light conditions, indicating detection mode, center pointing, low battery indication ect. Easy to Use & Auto Calibration: Easy-to-read LCD display and ergonomic anti-slip handle provide users with comfort and convenience while scanning. The wall detector can be automatically calibrated anywhere on the wall to successfully find the center of studs in one step. This function provides maximum reliability to the user, greatly reduces errors in the application, and ensuring that most objects behind the wall can be detected.