Calibration Before Use: Place the detector to be detected, press the MODE key to switch on, press the measurement key, when the LCD aperture gradually becomes smaller hear the 'di' sound indicates that the calibration is complete, then you can use it. Quality: This detector features an ergonomic handle that makes scanning easier and more stable while protecting the product from wear and tear. Whether you are a professional, homeowner or DIY enthusiast, this is the perfect choice . Accurate and Efficient: This stud finder is equipped with upgraded smart sensors, which can accurately and quickly locate wood, metal, AC wire, etc. behind the wall, saving the user's time and . 6-in-1 Multi-function Detection: This stud finder has 6 detection functions. Applicable Scenarios: The wall detector can detect metal, wooden and electrified cables hidden in walls, ceilings and floors (referred to as walls, ceilings and floors are conventional concrete, tiles, wooden boards, etc.)., Weight: 0.47178924068 pounds, Manufacturer: susaa