Features: The new 5-in-1 designs is more powerful, more accurate and has a longer lifespans. This product can quickly and easily locate wood metal studs, joists, metal pipe rebars and live ACwires behind wall, floor and ceilings. The alarm is designed to keep you aware of the wall at all times, allowing for more precise operation. The wall detector can clearly identify what objects are inside the wall, making it more clear and precise. Wood detection, metal detection, current detection. Adaptable to a wide ranges, as long as you want to see the inside of the opaques objects you can want to use it . Specifications: Material:ABS Battery Type:9V battery 6F22 (not included) Operating Current:<50ma Shutdowns Current:<10UA Automatic Shutdowns Time:3 minutes Detection Modes Selection Studs Modes In studs modes, there are 3 scan modes o choose for properly thick of the scannings surface: 1/2"Scan Modes can detect 1/2 in. (13mn) deep. 1"Scan Modes can detect 1 in. (25mm)deep. 1 1/2"Scan Modes can detect 1 1/2 in.(38mm) deep. If you do not know the depth of the detection, it is recommended to use 1/2"scan modes first. When 1/2"scan modes is not detected, use 1"or 1 1/2"scan modes instead. Metal Modes: The detection of magnetic metal can be as deep as 3.2inch. (80mm)(diameter 15mm galvanized steel tube) It can detect non-magnetic metals up 2.4in. (60mm) (diameter 13mm coppertube). ACModes: Detect unshielded AClive wire up to 2 in. (51mm) deep. Package Includes: 1x Wall Studs Finder note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.