All Franklin Sensors products are Made in the USA. We believe that high-quality products make high-quality projects, and we strive for excellence from beginning to end of our production process. ACCURATE More sensors More accuracy.Conventional stud finders have 1 or 2 sensors. The ProSensor M150 has 9, making it the most accurate stud sensing tool on the market. The ProSensor M150 has a max detection depth of 1.5. The precision LEDs track the location of studs while displaying the center and edges simultaneously. EASY One mode finds it all The ProSensor M150 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 M150 allows you to start scanning anywhere, even over a stud. DISPLAYS FULL STUDS The ProSensor M150 displays the center and edges of studs simultaneously, showing single studs, double studs, and irregular configurations that other stud finders cannot detect. Works through drywallsheetrock and more DURABLE 1 Rated by consumers and professionals, the ProSensor M150 stud finder is both accurate and durable. EXTRA FEATURES Live Wire Detection. Uses common AAA batteries. Is NOT compatible with rechargeable batteries.