1. It is used to find the wood, metal studs and joists, AC live wires when you are doing the following jobs: A. Hang cabinets and shelves securely B. Hang pictures and mirrors C. Install ceiling fans and chandeliers D. Install drapery rods and closet organizers E. Install plant hangers, towel bars F. Anchor machinery or furniture to walls G. Find metal pipes behind tile and in concrete H. Locates standard household wiring 2. Ergonomically designed hand-grips provide comfort for prolonged use. 3. No guesswork, LCD and audio signal indicate precisely when the EDGE of a stud has been found 4. Automatic calibration 5. Pencil line to easily mark location of stud edges 6. Low battery indication MODE Detecting depth Detecting accuracy Stud scan 19mm 3mm Deep scan 38mm 5mm Metal scan 30mm 6mm AC scan 50mm NA