Description: Quickly detect the center position of the stem. Detectable wood metal mandrel, wall thickness up to 1 1/2" (38mm). Detection of metal pipes with walls up to 3 inches (76 mm) thick. Detect live wires in walls up to 3 inches (76mm) thick. LCD display, easy to read. All detection functions have an auto-correction function. Metal mandrel metal detector, with metal detecting and tension function to detect the middle position of metal or wood in the wall, in addition to metal detection and tension function in the wall, whether the wall wire is loading, etc. Specifications:Item Name: 3 in 1 Wire Detector in the WallMaterial: ABS Shell: YellowSize: 15x7x3cm Power: 9V Battery (Not Included)Note:-There may be a small size error for manual measurement.-The color deviation may vary due to different monitor settings, please understand.