Features 1. 5 in 1 Multi-function Detection: The 5-in-1 stud finder is used to detect the center position of wood stalks, metal positions and live wires in walls made of wood and gypsum board, and has AC warning function. 2. 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. 3. Digital LCD Display: This stud finder comes with large LCD display and sound alarm, which can detect the exact location of the objects. 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. 4. Easy to Use: Easy-to-read LCD display and ergonomic anti-slips handle provide users with comfort and convenience while scanning. 5. Auto Calibration: The wall detector can be automatically calibrated anywhere on the wall to successfully find the center of studs in one steps. 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. Specification Material: ABS, TPE Size: 17 x 7 x 4 cm Color: Grey Weight: 170 g Battery: 1 9V Battery Wood Stop Detection I: Inch (12.7mm) Wood stop detection II: 1 inch (25.4mm) Wood Stop Detection III: 11/2 inches (38mm) Metal Detection: 2.36 inches (60mm) AC Detection: 2 inches (51mm) Package Included: 1x Wall Metal Detector