【SOUND NOTICE】 - The multi-function stud finder notice. When you have detected an object with the wall scanner, the most Middle bars on the screen and a steady beep will sound notice you object is in the wall. You can use the pencil which include in the package to point the location of the object. The audible and visible cues reliably keep users informed when any object, such as metal, AC live wiring gets found.
【AUTOMATIC CALIBRATION】 - Stud finder can be calibrated anywhere on the wall. It automatically recalibrates, when needed, to successfully find the center of studs in one step. Place unit flat on the wall. Press and hold the ON/OFF button. Do not move the unit until calibration is complete about 3 seconds. All indicators on the LCD are displayed while the unit goes through its about 3 seconds calibration cycle. Following the completion of calibration the unit will beep, and the selected mode icon will be shown on LCD.