Feature 1Powerful Function: The 5 in 1 design is more powerful, more accurate and lasts longer. It has a wide range of applications, so you can use it whenever you want to see inside an opaque object. 2More Accurate Operation: The alarm is designed so that you can always know the condition of the wall, so that the operation is more accurate. 3Easily Locate: This product quickly and easily locates wood metal studs, joists, metal tube rebar and live AC wires behind walls, floors and ceilings. 4Sensing Spatial Density Changes: Use upgraded internal sensors, it can sense changes in the density of the space behind the wall, and can position the center of the column very accurately. 5Function of Detector: Wall detector can clearly identify what objects in the wall, more intuitive, more accurate. Can be used for wood detection, metal detection, current detection.Item Type:StudFinderWallScannerWeight: 216g/7.6ozAlarm Mode: buzzingPower Supply: 1 x 6F22, 9v(shipped without battery)Display: LED green backlit screenPurpose: Metal detector .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Metal Detector1 x Instruction Manual