ACCURATE: More sensors = More accuracy. Conventional stud finders have 1 or 2 sensors. The ProSensor M70 has 7, making it the most accurate stud sensing tool on the market. The ProSensor M70 has a max detection depth of 1 1/2\"". The LEDs track the location of studs while displaying the center and edges simultaneously.\n\nEASY: One mode finds it all! The ProSensor M70 adjusts for a variety of depths, materials and textures. No calibration required. Press and hold the button to begin scanning. Unlike other stud sensors that give false readings, the ProSensor M70 allows you to start scanning anywhere, even over a stud.\n\nDISPLAYS FULL STUDS: The ProSensor M70 displays the center and edges of studs simultaneously, showing single studs that other stud finders cannot detect. Works through drywall/sheetrock and more!\n\nDURABLE: #1 Rated by consumers and professionals, the ProSensor M70 stud finder is both accurate and durable.\n\nMORE INFO: Uses common AAA batteries. Is NOT compatible wit.