Features: High accuracy, stable performance, long service life. Applicable Scene: renovation-, indoor installation, wall decoration. Suitable for use in interior decoration structure, can detect the location of metal and AC-wire in walls-. Suitable for use in interior decoration structure, can detect the position of metal and wire in the wall, when the induction of metal and voltage-, the instrument will flash and sound prompt. The 5-ln-1 stud-finder is used to detect the center position of the wooden- stem, metal position and the live-wire in the wall of wood, gypsum board and other materials and it has an AC-warning function. Specifications: Material: Plastic Stud- Scan l: 1/2in (12.7mm)Deep ll: 1in (25.4mm)Deep lll: 1 and 1/2in (38mm)Deep Metal- Scan: 2.36in (60mm)Deep AC-Scan: 2in (51mm)Deep Screen: LED LCD- Green Backlit Screen Batteries: One 6F22 Type 9V Battery(NOT Included) Size: Approx. 18x8x3.5cm/7.09x3.15x1.38in Note: One 6F22 9V batteries needed.(NOT Included) Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Stud-Finder 1x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.