With a Franklin Sensors stud finder, you have the fastest, easiest, most accurate stud finder on the market. To operate the ProSensor M92, 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. When you move the unit back and forth, the ProSensor M92 continues to track the location of the stud which makes it easy to instantly see the edges and the center of the stud. The wide LED display shows you the full width of single studs and double studs. 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 M92 has 9. With Franklin Sensors' patented technology, you can find stud positions with unbeatable accuracy. The ProSensor M92 take two AAA batteries. Do NOT use Rechargeable batteries. The ProSensor M92 is proudly mad

• ProSensor M92 Stud Finder. ACCURATE and EASY Center and Edge Finder with Intuitive LED Display for Wood and Metal.
• ACCURATE: More sensors = More accuracy. The ProSensor M92 has 9 sensors. Conventional stud finders have 1 or 2 sensors. With more sensors, Franklin Sensors stud finders are the market's most accurate and best stud finders.
• EASY: One mode finds it all! It finds wood studs, metal studs and the ProSensor M90 stud finder auto-selects the most accurate mode for changes in material or depth. No toggling between standard-scan and deep-scan.
• SHOWS THE CENTER AND EDGES OF STUDS SIMULTANEOUSLY: The ProSensor M90 saves you time by showing you more of what is behind the wall. It displays the center and edges of studs simultaneously, shows double studs and irregular configurations.
• NO CALIBRATION REQUIRED: To operate, just press and hold the button to instantly begin your scan.
• DETECTS WOOD AND METAL STUDS: The ProSensor M90 will identify any change in density - wood, or metal. No extra buttons or toggling.
• DURABLE: Designed for all users from homeowners to DIY enthusiasts to professionals, the ProSensor 710 stud finder is accurate and durable. It saves you time while still being tough enough to withstand being dropped off a ladder or tossed into a toolbox.