This latest stud finder features 5 Modes - 1/2 inch scan mode locates the center and edges of wood and metal studs up to 1/2 inch deep; 1 inch scan mode locates the center and edges of wood and metal studs up to 1 inch deep; Deep scan locates the center and edges of wood and metal studs up to 1.5inch deep; Metal scan detects metal (Ferrous and Non-Ferrous Metal) up to 2.36 inch deep; AC scan detects live unshielded AC wires up to 2 inch deep. Digital stud detector features LCD display together with the big sound warning to detect the accurate location of the objects. When find the material, the LCD display will indicate the direction and the intensity of beeping tells whether you are more close to the target. The fast detection saves users time greatly. Easy Calibrate: Press the Scan button to start calibration, the decreasing bars will disappear and buzzer will beep one time and the calibration is completed. Keep tool flat against the wall and do not rock, tilt, or press hard when slowly sliding across the surface being scanned. Once the edge of the stud is picked up, the stud finder will beep. The multi-function stud finder uses state-of-the-art sensor technology to accurately and quickly position rivet wood metal AC wires! In order to make your DIY more convenient, we have provided you with a level, batteries and marker pens on the product. I hope this combination will bring more convenience to your work Professional Technology & Service: a team dedicated to the development and production of stud detectors with professional technology and production processes that provide you with the highest quality and highest precision stud finder. Colour:Silver-Black Material:ABS Size:180x80x35mm Package Contents: 1 x Wall Scanner With battery 1 x level 1 x marker pens(The color is random, no specification is accepted) 1 x English manual 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.