The DMD4K is a digital, handheld, do-it-all sensor capable of finding wood studs, ferrous and non-ferrous metal materials, and 120V wiring behind walls or within concrete. The Multi-Detector can detect copper up to 3-1/8 inches deep and steel up to 4 inches deep. Exclusive features include a special Zoom-enhanced precision detection mode and automatic calibration, so users can start a scan from any location. Button controls change the sensing function between metal and wood stud; live 120V wiring detection capability is constantly active in both modes.