Power source: Requires one 6F22 9V battery (not included). Overview: This 5-in-1 stud finder is designed to locate the center of wooden studs, metal objects, and live wires within wooden and drywall, featuring an AC warning function. Applicable applications: This wall scanner can identify hidden metal objects, wooden studs, and live wires within walls, ceilings, and floors (constructed from standard materials such as concrete, ceramic tiles, and wood). Features: 1. Accurate positioning with user-friendly display 2. Comfortable touch and easy to use 3. Suitable for various situations. Detailed information: Detection depth levels: Wood detection I: 0.5 inches (12.7 mm) Wood detection II: 1 inch (25.4 mm) Wood detection III: 1.5 inches (38 mm) Metal detection: 2.36 inches (60 mm) AC detection: 2 inches (51 mm) Screen: LED LCD with green backlight Power: Requires a 6F22 9V battery (not included) Material: ABS/TPE