This Zircon StudSensor(TM) L20 stud finder is ideal for all your installation or renovation projects. It has a patented pinch grip design for an easy and secure hold in either hand, at any angle. With its easy-to-read display and its SpotLite® pointer, it clearly identifies the edges of studs and joists behind walls, floors, and ceilings. Its WireWarning® detection indicates the presence of live AC voltage up to 2" deep. The StudScan mode locates edges of wood or metal studs in walls up to 3/4" deep and the DeepScan® mode doubles the scanning depth to 1 1/2". It features a V groove for an accurate marking of the stud a "READY" light to indicate when calibration has completed successfully. This product is backed by a 1-year warranty.