Feature: 1. 5 Scanning Modes: This wall stud finder has 5 detection functions: wooden terrier depth detection 12mm, 25mm, and 38mm, metal detection recognition depth greater than 60mm, and AC wire detection maximum depth 51mm. 2. 2 Extra Functions: There is a 5cm long ruler on the top of the stud finder, which is convenient for customers to mark the center point and need to make additional marks next to the center point. Another is level function which is convenient for customers to use the level to observe whether it is balanced when placing objects after punching holes. 3. LCD Display \u0026 Sound Indication: This multifunctional wall scanner detector has a graphic LCD display which can indicate the scanning modes, calibration function and remaining battery indicator. The stud finder also features a backlight for use in the dark area. This stud finder wall detector provides a beep alert, which could remind you of the position of the stud. If there is a stud, metal or AC wire, you can know the position quickly and clearly. 4. Calibration Before Use: Place the detector on the wall to be detected. Press the MODE key to switch on, press the measurement key, when the LCD aperture gradually become smaller until you hear the \u0027di\u0027 sound that indicates that the calibration is complete, can be used. 5. 7 in 1 Multifunctional Stud Finder: You can get a wall stud finder and one user manual. There are 5 modes of this stud finder \u0026 another extra 2 functions (ruler \u0026 level). Specification: It is a hand-held, rapid wall test instrument designed to detect magnetic metals such as rebar and iron pipe; non-magnetic metals such as aluminium and copper pipe; and non-metallic metals such as wooden beams and electrically charged objects such as electrical wires, hidden in walls, ceilings and floors. Features: 5 Scanning Modes: This wall stud finder has 5 detection functions: wooden terrier depth detection 12mm, 25mm, and 38mm, metal detection recognition depth greater than 60mm, and AC wire detection maximum depth 51mm. 2 Extra Functions: There is a 5cm long ruler on the top of the stud finder, which is convenient for customers to mark the center point and need to make additional marks next to the center point. Another is level function which is convenient for customers to use the level to observe whether it is balanced when placing objects after punching holes. LCD Display & Sound Indication: This multifunctional wall scanner detector has a graphic LCD display which can indicate the scanning modes, calibration function and remaining battery indicator. The stud finder also features a backlight for use in the dark area. This stud finder wall detector provides a beep alert, which could remind you of the position of the stud. If there is a stud, metal or AC wire, you can know the position quickly and clearly. Calibration Before Use: Place the detector on the wall to be detected. Press the MODE key to switch on, press the measurement key, when the LCD aperture gradually become smaller until you hear the 'di' sound that indicates that the calibration is complete, can be used. 7 in 1 Multifunctional Stud Finder: You can get a wall stud finder and one user manual. There are 5 modes of this stud finder & another extra 2 functions (ruler & level). Specifications: Color: Black / Silver (Optional) Material: ABS Operating Temperature: 0-40°C Battery: 1 * 9V, 6F22, 900mAh Operating Current: