High sensitivity wire detector: The AC wire warning flags will appear on the LCD display whenever the live wires are monitoring in three detection modes. The Exposure Column will rise as the center of the Wood Stud Finder Approach Element, and the site of the tallest column will be the center of the studs. The beep will remind you when you find the target. AUTOMATIC CALIBRATION: Before detection, please press and hold the scan button for 1-2 seconds, and the wall metal detector will be calibrated. The beep sound will remind you when the job is done. You may need to recalibrate your material detector if the button was accidentally released at first or if you think it must 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 tool control. EASY TO READ: It is provided with a green backlit display, a beep sound and a visual indicator for precise detection. Stud mode: detect metal studs in 1/2 inch, 1 inch and 3/2 inches Metal mode: detect metal pipes, rebars, etc. up to 3 inches AC mode: detect unshielded AC live cable up to 3 inches Quantity: 1 piece, yellow (battery not included) Note: this does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!