High Sensitivity Wire Detector: AC wire warning flags will appear on the LCD screen whenever live wires monitor in three detection modes. The Exposure Column will rise as the center of the wood stud detector approach element, and the site of the tallest column will be the center of the studs. The beep sound will remind you when you found the target. AUTOMATIC CALIBRATION: Before detection, please hold the scan button for 1-2 seconds, and wall mounted metal detector will be calibrated. The beep sound will remind you when the job is finished. You may need to recalibrate your material detector if the button was accidentally released at first or if you think it needs to do so during the process. EXCELLENT BACKLIGHT SCREEN: Metal detector has Features with LCD backlight, providing a clear look even in low light conditions, indicating detection mode, center pointing, low battery indication. Audio indication, with beep to remind. ERGONOMIC DESIGN: Designed with soft handles to provide comfort and better control of the tool. EASY TO READ: It is equipped with a green backlit screen, an audible beep and a visual indicator for precise detection.