Features: When sound and screen display disappear, turn on the studs finder and complete the calibration by placing beam finder on the wall. Automatic calibration prior to use provides the user with reliability and accuracy. Then put it on the wall. 5-in-1 Multifunction Depth Detection - The digital wall scanner includes four different scan modes for wood, beam, joists, metal, wires and deeply embedded objects. Easy-to-read LCD screen shows required studs material and exact location of the studs The digital studs scanner features a large LCD display and loud warning to detect the exact location of the object. When the material is found, the LCD screen will indicate the direction, and the intensity of sound will tell you. The Wall Scanner is an electronic studs finder with multi-sensing technology that can locate studs/wood/wires at multiple locations on the wall. The ergonomic of this finder makes it comfortable to hold. Helping you avoid hazards when installing TV, cabinets, garage shelves, and more. Specifications: Material: Plastic Studs Scan l: 1/2inch (13mm) ll: 1in (25mm) lll: 1 and 1/2inch (38mm) Metal Scan: 3.2inch (80mm) Wire Scan: 2inch (51mm) Screen: LCD Green Backlit Screen Battery: One 6F22 9V Battery Needed(NOT Included) Size: Approx. 14.5x6x3cm/5.71x2.36x1.18in Package Includes: 1x Studs Finder note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.