Product Features: 1/2 inch Stud Scan Mode:Detects wood or metal studs up to 13mm deep 1 inch Stud Scan Mode:Detects wood or metal studs up to 25mm deep 1 1/2 inch Stud Scan Mode:Detects wood or metal studs up to 38mm deep Metal Mode:Detects metal up to 80mm for magnetic(60mm for non-magnetic) deep Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! AC Mode:Detects live unshielded AC wires up to 51mm deep Metal Depth Indicator Low Voltage Indicator Battery Type:9V battery(6F22,not include) Operating Current:Less than 50ma Shutdown Current:Less than 10UA Automatic Shutdown Time:3 minutes Purpose: Quickly locate wood, metal, and AC wires hidden in the walls, floors, and ceilings of a house. It can work in Flat noodles, wallpaper, wood floor, acoustic ceiling, painted wall and other places. Prevent you from encountering danger when installing televisions, cabinets, garage racks, etc. Material: ABS Color: As shown Package Contents: 1 x Stud Finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.