Wall ScannerMetal Detector Metal Wood Stud AC Live Wires Copper Finder Depth Tracker Electrical Detection InstrumentFeature:1. This detector can be used to detect wall studs, metal pipes, and wires.2. When it detects wall studs, metal pipes, and wires, it will make a sound and light to alert you.3. Ergonomically designed for comfortable use.4. Finds wood edges or metal rivets up to 3/4" (20mm) deep.5. A perfect home improvement tool. Specification: Model: TS-78B Detection Capacity (Depth): Up to 20mm LED Light: Green and Red Power Supply: 9V 6F22 Battery (Not Included) Size: 140x60x2 5mm/5.51x2.36x0.98in Material: ABS Weight: Due to the light and screen difference, the color of the items may be slightly different from the picture. Please allow 1-3cm size difference due to manual measurement.1 x Wall Metal Detector