BLACK+DECKER BullsEye Auto-Leveling Interior Line Laser / Stud Sensor is the complete all-in-one tool for hanging and leveling items on the wall. Perfect for hanging frames and more the line laser/stud finder detects wood and metal studs behind the surface of your wall and even detects A/C wires. Our patented BullsEye technology levels automatically projecting a horizontal level line onto your wall for easily hanging and mounting frames. The unit’s built-in LCD display is easy to read for users of all skill levels and the unit’s compact and lightweight design make it convenient for all.