Locate studs, metal or AC voltage behind the wall before cutting or nailing. Whether searching for studs or simply installing bracing, knowing what lies beneath the surface can ensure a safe work environment. The Scan-Test integrates multiple technologies into one easy to use tool. Scan the wall to find either wood or metal studs for secure installations, while avoiding metal pipes or other metal objects behind the wall. Cuts or nicks in the insulation of wiring can cause long-term problems in electrical systems and even cause unsafe working conditions, so avoid nailing to a live wire behind the wall by scanning for AC voltage with Circuit Alert technology. Correctly wired receptacles are a must, and this 5-in-1 multi-scanner includes an integrated outlet tester with GFCI test functionality.