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 energy. 6-in-1 Multi-function Detection: This stud finder has 6 detection functions. 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 . 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.). Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour: Black Material: ABS Operating Temperature: 0-40C Operating Voltage: One 9V battery (Not included) Operating Current: Less than 20mA Battery: Low battery indicator Screen: LCD & 3-color LED display of measurement results Positioning: Wooden terrier & edge positioning Alerts: Beep alert Package Contents: 1 x Stud Finder 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.