Features: Unparalleled Accuracy and Intuitive Feedback: Our wall scanners feature advanced LCD technology to clearly present measurements. This visual clarity, coupled with a unique audios signal, easily guides you through the detection process, ensuring accurate-readings every time. Purpose: Quickly locate wood, metal, and AC-wires hidden-in the walls, floors, and ceilings of a house. It can work in Flat noodles, wallpaper, wood floor, acoustic ceiling, spray painted wall and other places. Prevent you from encountering danger when installing televisions, cabinets, garage racks, etc. 5 in 1 Stud Scanning Tool: Stud scanning is available in 5 modes: 1/2 inch (13 mm), 1 inch (25 mm), and 1.5 inches (38 mm), metal scanning (38 mm), and AC-scanning (51 mm). Highly-Accurate: Advanced Intelligent Microprocessor chip that can accurately and quickly find edges and center of metal, studs, joists, pipes, and live AC-wire behind walls, floors, and ceilings. Audios Alarm: This stud finder wall scanner ensures precise detection of studs and wires behind walls. The beeping alarm alerts you when near the edge or center of the target, making it a must-have tool for both DIY enthusiasts and professional contractors. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Power supply: 9V battery (battery not included) Battery model: 9v battery 6F22