Features: 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. Specification: Item Type: Wall ScannerMaterial: ABSBattery: 6F22 9V (Not Included)Measuring Range: 10cAlarm Method: Sound and GraphicDetects Metal Size: 4cWeight: Approx. 145g/5.1ozUse: Can be used to detect wood metal pipes wires etc Package List: 1 xWall Scanner (Battery Not Included)1 x Manual