ACCURATE: More sensors = More accuracy. Conventional stud finders have 1 or 2 sensors. The Sapphire 9000 has 9, making it the most accurate stud locator on the market. 1 1/2" DEEP SCAN ALWAYS ON: One mode finds it all! The Sapphire 9000 adjusts for a variety of depths, materials and textures to find wall studs through sheetrock/drywall and more. No calibration is required, simply press and hold the button to begin scanning. Unlike other stud finders that give false readings, the Sapphire 9000 lets you start scanning anywhere, even over a stud. SHOWS THE FULL WIDTH OF STUDS: See more than just a point on the wall. The LEDs track stud center and edges, showing single studs, double studs and irregular configurations other stud finders cannot detect. DETECTS WOOD AND METAL STUDS: The Sapphire 9000 wall scanner identifies any change in density—wood or metal—no extra buttons required. MORE INFO: Requires two AAA batteries (not included). Is NOT compatible with rechargeable batteries. With a Franklin Sensors stud finder, you have the fastest, easiest, most correct stud finder on the market. To operate the Sapphire 9000, 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 Sapphire 9000 has an Enhanced Precision LED display. With 9 LEDs the Sapphire 9000 more precisely identifies 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 Sapphire 9000 has 9. With Franklin Sensors’ patented technology, you can find stud positions with unbeatable accuracy. The Sapphire 9000 is the perfect tool for many projects ranging from hanging and leveling pictures to installing cabinets and flat screen TVs. Once you try the Sapphire 9000, Franklin Sensors stud finders will quickly become your favorite. Franklin Sensors stud finders are proudly made in the USA.