Heavy duty pistol grip detection tool for professional commercial and industrial applications with an included 12 volt rechargeable battery system. The M12 Sub-Scanner Detection Tool is a fully featured industrial tool using the M12 rechargeable battery system. The same M12 battery and charger can be used with other compatible Milwaukee M12 power tools. Milwaukee 2290 M12 Sub-Scanner Detection Tool features: measures depth and location of rebar up to 6" through concrete; detects location of wood, PEX, PVC, and metal; differentiates between steel (ferrous) and copper or aluminum (non-ferrous) metals; ac voltage detection to identify the location of live wires; scans through gypsum, ceramic tile, marble and concrete; intuitive user interface displays stud centers and edges; high contrast, white on black display and backlight for easy reading; rugged over-molding improves durability and user grip; auto-calibration for all surfaces.