1,[Auto Calibration] Wall scanner auto calibration provides you with maximum reliability and accuracy. Easy to read LCD display, in stud or deep mode, place it on the wall you want to test for calibration in AC or metal mode, place it in the breath for calibration. 2,[LCD Display] When a substance is found, the LCD display will indicate the direction and the strength of the beeping sound to tell you whether you are approaching the target. Fast detection greatly saves the user's time. 3,[Sensor Technology] The stud detector wall scanner uses advanced sensor technology to accurately and quickly locate studs, wood, metal, and AC wires. 4,[Quick Location] Wall stud finder can quickly and easily locate the wall, floors and ceilings behind wood metal stud beams, metal pipe threads and live AC wires. 5,[ and ] Wall scanner is light in weight, small in size, easy to carry and store, convenient and quick to use, and stable in performance. 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. Sold by-YJL official store