With a Franklin Sensors stud finder, you have the fastest, easiest, most accurate stud finder on the market. Now, with significantly deeper sensing, Franklin Sensors is pleased to introduce the ProSensor MAX. The ProSensor MAX has 2 modes. In mode 1, the MAX will operate as a normal Franklin Sensors stud finder and is ideal for common situations, such as a single layer of drywall. In mode 2, the MAX is ideal for sensing more deeply and is optimized for thicker surfaces such as two or more layers of drywall, OSB, plywood, MDF surfaces, lath and plaster, and large tile. To operate the ProSensor MAX, simply press and hold the button, 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 middle LED will turn green to indicate stud centers. Franklin Sensors stud finders are the most accurate stud finders because they have more sensors. Other stud finders have only 1 or 2 sensors. The ProSensor MAX has 13 deep scanning sensors. The MAX uses capacitive sensing to detect changes in density, making it double as a metal and wood stud finder. With Franklin Sensors' patented technology, you can find studs with unbeatable accuracy. The ProSensor MAX is the perfect stud finder for mounting TVs in home theaters, installing shower grab bars, and hanging shelves in your garage. Once you try the ProSensor MAX, Franklin Sensors stud finders will quickly become your favorite.