Features: High accuracy, stable performance, long service life. Applicable for renovation, indoor installation, and wall decoration. Suitable for use in interior decoration structures to detect the location of metal and AC wires in walls. Detects the position of metal and wire in walls; when metal or voltage is detected, the device provides visual and audible alerts. 5-in-1 stud finder detects the center of wooden studs, metal, and live wires in wood, drywall, and similar materials, with AC voltage warning function. Specifications: Material: Plastic Stud Scan Depth: I: 1/2 in (12.7 mm) II: 1 in (25.4 mm) III: 1-1/2 in (38 mm) Metal Scan Depth: 2.36 in (60 mm) AC Scan Depth: 2 in (51 mm) Screen: LED LCD with green backlit display Battery: One 6F22 9V battery (not included) Size: Approx. 18 x 8 x 3.5 cm / 7.09 x 3.15 x 1.38 in Notes: One 6F22 9V battery required (not included). Allow 12 cm variation due to manual measurement; please consider this before ordering. Due to monitor differences, the actual item color may vary from the image. Package Includes: 1 x Stud Finder 1 x Manual