1,[Position Detection] The wall scanner can detect the depth and position of metal, wood and live circuits in wall separately, suitable for interior structures. 2,[Double Alert] When the wall scanner senses metal, wood and live circuits, it will have an analogue bar display and an audible alert for convenience and practicality. 3,[Principle Of Operation] Designed using the principle that changes in the strength of the material below the surface of the object being measured cause a change in the frequency of the detector. 4,[Wide Application] Wall detector can test metal, wood and live circuits separately, with a maximum detection depth below the surface of a uniform object. 5,[Wear Resistant And Durable] The digital wire finder is made of ABS material, which is durable, wear resistant and not easy to break. Compact size, easy to carry. Item Type: Wall ScannerMaterial: ABSBattery: 6F22 9V (Not Included)Measuring Range: 10c㎡Alarm Method: Sound and GraphicDetects Metal Size: 4c㎡Weight: Approx. 145g or 5.1ozUse: Can be used to detect wood, metal pipes, wires, etc Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.