PRODUCT DESCRIPTION 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. AMAZON.COM The Black & Decker BDL190S BullsEye Auto-leveling Interior Line Laser and Stud Sensor Combination Tool is an ideal tool for hanging pictures, detecting wood and metal studs, locating live A/C wires, and installing decorative items. With patented auto-leveling technology, this leveler is actually two tools in one--an auto-leveling laser level and a stud sensor. Its auto-leveling laser levels automatically without adjustments and projects horizontal laser lines. Other features include a stud sensor to detect wood, metal, studs, and live A/C wires and an easy to read LCD display. Categorized as a class IIIR laser, this laser level comes backed by a 2-year limited warranty.