Features: 1. The stud detector adopts the most sensitive intelligent microprocessor chip, which can accurately and quickly detect wood, pipes, metals and AC wires hidden in walls, floors and ceilings. 2. Digital wall scanner has five scanning modes, including 1/2", 1" and 1-1/2" scanning modes, which are used to locate the center and edge of wood, beams, joists, metals or deeply buried objects. Among them, metal scanning mode detects ferrous and nonferrous metals with a depth of 2.36 inches, and AC scanning detects unshielded 80-240 AC voltage lines with a maximum length of 2 inches. 3. Open the stud detector, place it flat on the wall and press the scan button to calibrate it. The smart micro sensor chip will flash and beep when hidden wood, metal and AC wires are found. 4. The detector and scanner have liquid crystal display and sound warning. The signal bar on the LCD screen will remind you of the distance and direction of the approaching object, and it will beep to determine the location. 5. This LCD also has backlight function, which can provide clear display even in low light, such as display detection mode, center indication, low battery indication, etc. 6. Wire Warning Indicator: when you scan in Stud Scan/Deep Scan/Metal Scan mode, the detection depth of stud finder can reach 2 inches. The wire warning will always light up to remind you that there are live AC wires, which will help you avoid danger when installing TV, bathroom cabinet, photo frame and garage rack. 1. Power supply: 9V (not included) 2. Alarm mode: tweet 3. Measuring range: 12.7-51mm 4. Measuring metal size: 60mm 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Size: 180*80*35mm Delivery color: as pictured Quantity shipped: 1