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. Metal Depth Indicator. Green Backlight. Low Voltage Indicator. Operating Current:Less than 50ma Function: The seven functions are: 1. Three pieces of wood with a depth of 0.5 inches 2. Three pieces of wood with a depth of 1 inch 3. Three pieces of wood with a depth of 1.5 inches 4. Metal detection 5. AC power 6. Depth of metal detection 7. Distinguishing whether metals are magnetic or not. Model:-710 Weight:170G Battery:9V battery (shipped without battery) Battery model: 9V battery 6F22 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 1/2 Inch 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. Colour:As Shown Material:Plastic Package Contents: 1 * Stud Finder Wood Studs 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.