The wall scanner enables you to detect electric wire, metal object, wooden beams accurately, which is a great tool for interior finish, renovation, furniture installation, flooring, pipe installation, and building construction. Features: Professional Wall Stud Finder: mainly used to detect wood stud under gypsum board, metal (water pipe, steel bar, copper pipe), live wire. Multiple Detecting Modes: including stud, thick, metal, and AC wire detecting. Sound and Light Alarm: when detecting various materials under the different modes, LED indicator will flash the corresponding color, and buzzer alarms. User-friendly Design: Ergonomic handheld and anti-slip body for comfortable and firm grip, 1 meter drop-proof is safe to use. Adopts Advanced Sensor Technology: with high accuracy performance and quickly locate metals. Digital Stud Sensor: 2-inch large LCD digital display with backlight, also with battery indication. Note: Wall Material that Can be Scanned: plasterboard, plywood, hardwood flooring, wood coating wall, and wallpaper. Wall Material that Can Not be Scanned: carpeting, ceramic tile(only metal), metal wall, cement wall. Specifications: Material: ABS Maximum Detection Depth: Stud Scan Mode(Wood): 19mm Thick Scan Mode(Wood): 28.5mm AC Electric Wire: 50mm Metal Scan Mode: 76mm (ferrous metals: 76mm, non-ferrous metals(copper): 38mm) Detect Principle: Electro-magnetic induction Detects: Wooden beam, metal object, electric wire Notifications: LED/buzzer Working Temperature: -7~49 (19~120) Storage Temperature: -20~66 (-4~150) Power Supply: 1 * 9V 6F22 battery (NOT included) Item Size: 186 * 70 * 44mm / 7.32 * 2.76 * 1.73in Item Weight: 201g / 7.11oz Package Weight: 301g / 10.61oz Package Size: 27 * 10.5 * 6.5cm / 10.63 * 4.13 * 2.56in Packing List: 1 * Wall Stud Finder