The Zircon MultiScanner Pro SL is the tool to use for all sub-surface scanning projects. It easily and accurately locates the edges of studs and joists. It also finds metal and traces live electrical wire. A 4-mode switch provides instant access to all functions. A wide LCD array indicates an approaching stud. A full LCD arrow, audio tone, and SpotLite Pointing System alert users when stud edges are located. Stud Scan mode finds wood or metal studs and joists up to 0.75" deep. DeepScan mode doubles the scanning depth to 1.5". Metal mode detects non-ferrous metal, such as copper pipes, up to 1.5"deep, and ferrous metal, such as Rebar in concrete, up to 3"deep. AC Scan finds and traces live, unshielded electrical wire up to 2"deep. Patented SpotLite Pointing System and audio alert identify targets instantly. In stud or metal scanning modes, WireWarning Alert identifies the presence of live, unshielded electrical wire up to 2" deep. Patented TruCal technology calibrates to any wall's density and a green LED TruCal light alerts the user when the tool is calibrated and ready to scan.