Five Scanning Modes: The stud finder provides 5 scanning modes in total for detecting. Depending on the tasks you have, you can switch to the mode you want. Digital LCD Display and Audio Alarm: The wall stud locator has a large LCD display with a large audible warning to detect the location Precise objects, so you can know what is behind the wall before doing a job, avoiding trouble and danger Precise and fast location: The wall scanner adopts intelligent micro-sensor chip which can accurately and quickly find the edges and center of metal, nails, joists and pipes, live AC wires behind walls, floors and ceilings. Auto Calibration: The Detector mural can be automatically calibrated anywhere on the wall to successfully find the center of studs very efficiently. This feature greatly reduces errors in the application, and ensures that most objects behind the wall can be detected. Wide Usage: Beam Detector is the widely used handheld devices for construction projects. home improvement. This electronic stud finder quickly locates wood, metal and AC wires hidden in walls, floors, towers and ceilings around the home. Features : 1. Wireless and Portable. Five Scan Modes: (1) 1/2" Scan: 1/2" (13cm) scan mode locates the center and edges of the wood. (2) 2.5cm dowel scan: medium scan locates the center and edges of wood up to 25mm deep. (3) Stud Scan: Deep scan locates center and edges of wood up to 38mm deep depth. (4) Metal Scan: Metal detects metals up to 60mm deep. (5) AC Scan: AC scanner detects power up to 51mm depth. Backlit LCD display and sound indication. 4. Automatic calibration of all detected functions. Low battery indicator. Power: 1 x 6F22 9V battery (not included). Instructions for use: Select the probe type, then press and hold the side button and scan horizontally on the surface of the object. Keep the tool flat against the wall and do not rock, tilt or press hard when you slide slowly across the surface to be scanned. A pointed down arrow and an indication will light up, indicating the location of the edge of the nail. Keep dragging. When the center of a stud is located, the full bars on the signal strength indicator, the pointed arrow on the top of the bars, the center indication will appear, and the buzzer will sound. Contents: 1 stud finder Note: The data are all manual measurement, please allow an error of 1 - 3cm, due to the light and display difference, there will be some color difference, depending on the physical object received.