Maximum depth when detecting different objects -3 detector modes: stud scan mode, metal scan mode and AC line scan mode -Detection of ferrous metals with a depth of 120 mm -Detection of non-ferrous metals (copper) with a depth of 100 mm -Detection of AC power up to 50 mm deep -Inspect copper wires up to 40 mm deep -Inspect wood with a depth of 38 mm Working environment humidity: 0-85%RH (metal mode) Working environment humidity: 0-60%RH (object mode) Working environment temperature: -10~+50 1* 9V battery not included