Purpose: Quickly locate wood, metal and AC wires hidden in the walls, floors and ceilings of your home. It works on lath, wallpaper, wooden floors, acoustic ceilings, painted walls and more. Avoid dangers when you install , cabinets, garage racks, and more. 1/2inch Stud Scan Mode:Detects wood or metal studs up to 13mm deep 1inch Stud Scan Mode:Detects wood or metal studs up to 25mm deep 1 1/2inch 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) AC Mode:Detects live unshielded AC wires up to 51mm deep Metal Depth Indicator Green Backlight Low Voltage Indicator Battery Type:9V battery(6F22 no without) Operating Current:Less than 50ma Shutdown Current:Less than 10UA Automatic Shutdown Time:3 minutes 1.Detection Mode Selection Stud Mode In stud mode, there are 3 scan modes o choose for properly thick of the scanning : 1/2inch Scan Mode can detect 1/2 in. (13mn) deep. 1inch Scan Mode can detect 1 in. (25mm)deep. 1 1/2inch Scan Mode can detect 1 1/2 in.(38mm) deep. If you don't know the depth of the detection, it is recommended to use 1/2inch scan mode first. When 1/2inch scan mode is not detected, use 1inch or 1 1/2inch scan mode instead. Metal Mode: The detection of magnetic metal can be as deep as 3.2 in. (80mm)(diameter 15mm galvanized steel tube) It can detect non-magnetic metals up tc 2.4 in. (60mm) (diameter 13mm copper tube). AC Mode: Detect unshielded AC live wire up to 2 in. (51mm) deep. Size: 195x88x38MM The actual product may have slight color differences or differences, which does not affect use. Colour:orange Material:plastic 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.