ACCURATE: More sensors = More accuracy. Conventional stud finders have 1 or 2 sensors. The ProSensor MAX had 13, making it the most accurate stud sensing tool on the market. The ProSensor MAX has a max detection depth of 2 1/2" for thick walls. The precision LEDs track the location of studs while displaying the center and edges simultaneously. EASY: No calibration required. Just place the ProSensor MAX against the wall and press and hold the button to begin scanning. Unlike other stud sensors that give false readings, the ProSensor MAX allows you to start scanning anywhere, even over a stud. TWO DETECTION MODES: In mode 1, the ProSensor MAX operates as a normal stud finder. In Mode 2, the ProSensor MAX detects studs through two or more layers of drywall (common in condos, townhomes, and home theaters), a single layer of sheetrock plus a layer of OSB or plywood (common in earthquake-resistant walls), plywood and MDF surfaces, lath and plaster (common in homes built prior to 1960), and large tile. DISPLAYS FULL WIDTH OF STUDS: See more than just a point on the wall. The ProSensor MAX’s wide LED display shows the center and edges of studs simultaneously for single studs, double studs, and irregular configurations that other stud finders cannot detect. DURABLE: Ideal for professionals and projects around the house, the ProSensor MAX is both accurate and durable. CONVENIENT EXTRAS: Built-In Bubble Level, Low Battery Indicator, and Handy Pencil Caddy. Requires two AA batteries (not included)., Weight: 1.1 Pounds, Manufacturer: Franklin Sensors