Description: 5 in 1 Wall Scanner: 5-in-1 mode provides users with more detection needs, which is suitable for accurately and quickly locating the edges and center of metal tubes, fire lines, studs, wooden frames, steel bars and supporting beams hidden behind walls, floors and ceilings. Five Scanning Modes: Our wall scanner detector with 5 scanning modes, including 1/2 inch scan mode locates the center and edges of wood; medium scan locates the center and edges of wood up to 1 inch deep; Deep scan locates the center and edges of wood up to 1.5inch deep; Metal scan detects metal up to 2.36 inches deep; AC scan detects live unshielded AC wires up to 2 inch deep. Ergonomic Grip for Comfortable Use: The stud wall scanner comes with cordless lightweight, handheld body and anti-slip design. It can automatically calibrate and AC warning function, which provides users with comfort and convenience while scanning. Come with a 9V battery. Automatically Calibrated: Place the wall scanner flat on wall, and press and hold the scan button to start calibration. Calibration is completed until its decreasing bars will disappear and buzzer will beep one time. LCD Screen Backlit: The wall detector with a graphical LCD backlight, can indicates accurate directions and show detection mode, signal strength, center pointing, low battery indication. Specification: Material: PC/ABS Size: approx. 165x76x35mm/6.5x3x1.38inch Power Supply: 9 volt Battery Working temperature: 0-40°C Display: LCD green backlight screen Package Includes: 1 Piece Stud finder 1 Piece 9V Battery Note: It is improtant to wait for calibration to complete (2-3 seconds), every time before moving the scanner.