ACCURATE: More sensors = More accuracy. Conventional stud finders have 1 or 2 sensors. The ProSensor M210 has 13, making it the most accurate stud sensing tool on the market. The ProSensor M210 has a max detection depth of 1 1/2". The precision LEDs track the location of studs while displaying the center and edges simultaneously. EASY: One mode finds it all! The ProSensor M210 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 M210 allows you to start scanning anywhere, even over a stud. DISPLAYS FULL STUDS: The ProSensor M210 displays the center and edges of studs simultaneously, showing single studs, double studs, and irregular configurations that other stud finders cannot detect. Works through drywall/sheetrock and more! DURABLE: #1 Rated by consumers and pros, the ProSensor M210 stud finder is both accurate and durable. EXTRA FEATURES: Live Wire Meter. Requires two AA batteries (not included). With a Franklin Sensors stud finder, you have the fastest, easiest, most accurate stud finder on the market. To operate the ProSensor M210, simply press and hold the button then place it on the wall and go. There is no calibration procedure. You can instantly find studs. Once you have it on the wall, the LEDs show you right where the stud is. The M210 has an Enhanced Precision LED display. with 21 tightly spaced LEDs the M210 more precisely identifies studs. When you move the unit back and forth, the ProSensor M210 continues to track the location of the stud which makes it easy to instantly find the center and edges. Franklin Sensors stud finders are the most accurate stud detectors because they have more sensors. Other stud finders typically have only 1 or 2 sensors. The ProSensor M210 has 13, making it the best stud finder on the market. With Franklin Sensors' patented technology, you can find stud positions with unbeatable accuracy. The extra wide display on the M210 allows you to see the full width of objects such as double studs and multiple studs. The M210 also identifies live wires for extra safety. Additional features include a built-in bubble level and convenient pencil caddy to make it the perfect wall scanner for hanging and leveling pictures to installing cabinets and flat screen TVs. Once you try the ProSensor M210, Franklin Sensors stud finders will quickly become your favorite.