1. Product Information: Advanced sensor technology is used to accurately and quickly locate metal pipes, fire lines, joists, wood framing, rebar, and support beams hidden behind walls, floors, and ceilings. It has five different scanning modes. 2. Spiral mode detects wood joists up to 38 mm (1.5 in) deep in drywall. Metal mode detects pipes up to 7.62 cm (3 in). Depth mode can detect wood and metal parts up to 60 mm (2.4 in), and the 85 - 240 VAC mode can be used to detect wires up to 51 mm (2 in) long with live and live wires. 3. For convenient use, press and hold the scan button for 1 - 2 seconds before testing. Automatic calibration provides the user with reliability and accuracy. 4. The ergonomic design of this wall detector allows it to be mounted at any angle. The LCD screen displays the required stud fastener and the exact stud location. 5. When a fastener is found, an audible signal is displayed on the LCD screen to let the user know if they are close to the target. Fast detection saves the user time and effort and makes tasks easier. 6. Because the stud finder looks for density changes behind drywall, rather than a specific material, the detector responds to metal studs in the same way as it does to wood studs in both stud scan and depth scan modes. 7. Use the metal scan mode to determine if previous stud scan readings were for wood studs, metal studs or pipes. 8. The multi - function wall scanner detector has a graphical LCD screen that can display many indications during detection, such as signal strength in detection mode, automatic calibration, battery indication and reading accuracy. 9. When the battery power is low, the low battery indicator icon will be displayed to remind the user to replace the battery with a fully charged one in time.