Great for hanging frames and much more, the Bulls Eye auto leveling laser is 2 tools in one. A level projects a horizontal laser level line for precise measurements and a stud sensor detects wood, metal studs and live A/C wires behind walls. Bulls Eye auto-leveling technologyTwo tools in one to simplify hanging and mounting projectsLevels automatically for precise BullsEye resultsProjects horizontal level lineStud sensor detects wood and metal studs plus live A/C wiresLCD display easy to readIdeal for locating live A/C wire, detecting wood and metal studs, hanging pictures