Bosch Digital Wall Scanner

The Bosch GMS120 Digital Wall Scanner features multimode detection capability. The tool is able to detect wood studs, metal objects or live wiring in floors and walls, so you can figure out what you are up against before you start a job. It has a deep detection mode for pipe in concrete of up to 4-3/4 inches. Because of its versatility and consistent performance, it’s an ideal tool for anyone who need reliable detection of studs, pipes, electrical wires, and other objects in walls.

This kit includes one Bosch GMS120 digital wall scanner ($55) with hand strap, battery and carrying case ($10).
BOSCH GMS120 Digital Multi-Mode Wall Scanner