With a Franklin Sensors stud finder, you have the fastest, easiest, most correct stud finder on the market. To operate the M150, 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 M150 has an Enhanced Precision LED display. With 15 LEDs the M150 more precisely identifies studs. When you move the unit back and forth, the M150 continues to track the location of the stud which makes it easy to instantly see the edges and the middle of the stud. As well as this, it can also find two studs at once. Franklin Sensors stud finders are the most accurate stud finders because they have more sensors. Other stud finders typically have only 1 or 2 sensors. The M150 has 9. With Franklin Sensors’ patented technology, you can find stud positions with unbeatable accuracy. The M150 may also identify live wires. The M150 also features live electrical detection to make it the perfect tool for many projects ranging from hanging and leveling pictures to installing cabinets and flat screen TVs. Once you try the M150, Franklin Sensors stud finders will quickly become your favorite. Franklin Sensors stud finders are proudly made in the USA.