The Electronic Wall Stud Finder SY01 is an excellent device for locating the position of studs in a wall, thereby making the hanging of heavy objects very easy. This tool is perfect for homeowners or DIY enthusiasts who want to do some renovation work. The SY01 is an intelligent stud finder that detects the center of wood studs in walls up to 3/4-inch deep, ensuring you get accurate results every time. The device is easy to use and can be operated with one hand, which makes finding studs a breeze. PLEASE SEE THE PHOTOS BEFORE BUYING. The item is new and as seen in the photos. The battery was used to test the item.