Feature: 1. ACCURATE AND FAST: The wall scanner use a highly sensitive smart microsensor chip to accurately and quickly find the edges and centers of metal, studs, joists, pipes, AC lines behind wall, floors, and ceilings. Quick detection save users time and effort, making it easier to complete tasks. Whether professional, homeowner or DIY enthusiast, this must be a good choice 2. EASY TO USE: The Stud Finder Wall Scanner easy to read LCD display and ergonomic non slip handle provide users with comfort and convenience while scanning 3. AUTOMATIC CALIBRATION: This wall detector can automatically calibrate any position of the wall, successfully finding the center of the bolt in one step, providing the user with maximum reliability, greatly reducing errors in applications, and ensuring detection of most objects behind the wall 4. DIGITAL LCD DISPLAY AND AUDIO ALERTS: This stud finder feature a large LCD display and audible alarms that accurately identify the location of objects. When the object is found, the LCD display will indicate the direction and strength of the buzzer, telling you if you are closer to the target. This LCD also has a backlight function that provide a clear appearance even in low light conditions, showing detection mode, center pointing, low battery indicator, and more 5. WIDELY USED: This stake detector can quickly locate, suitable for different wall surfaces, such as lathes, wallpaper wood floors, acoustic ceilings, painted wall, etc. Help you avoid hazards when installing TVS, cabinets, garage racks, etc. Specification: Item Type: Wall Scanner Material: ABS Magnetic Metal Detection: Approx. 100mm / 3.94in Non Magnetic Metal Detection: Approx. 80mm / 3.15in Live Wire Detection(when energized): Approx. 50mm / 1.97in Wood Detection: Approx. 25mm / 0.98in Auto Power Off: 3 Minutes(no operation) Operating Temperature Range: -10 to 50℃ Storage Temperature Range: -20 to 70℃ Battery: 3 x AAA batteries(not included) Operating Time: Approx. 6 hours. Package List: 1 x Wall Scanner 1 x Waist Bag 1 x User Manual