The Peachtree M688 Professional Grade Stud Finder Sensor Detector easily and quickly locates the edge and center of wood wall studs behind walls and ceilings. This highly tested, lightweight and well thought out stud finder has been engineered to perform at a high level of precision and craftsmanship that makes your investment in this tool a wise choice. This stud finder measures 7"x1"x1" and is designed to fit in your pocket or tool belt for easy access and use. A perfect gift for the handyman or handy woman in your life. Enjoy the peace of mind knowing that you won't be putting unnecessary marks and holes in your walls by owning the M688 Stud Finder. It is designed to work! Features include: Blue color to make this tool stand out and hard to lose or misplace-Stud detection up to 1" thickness-auto calibration-built in precision bubble level makes this a 2 in 1 tool-low battery buzzer indicates low battery level-LED light and buzzer sounds for easy detection. From the ease of use, to it's light weight durable construction and ergonomic design, the Peachtree M688 is a tool that is engineered to operate at a consistently high level. The simple density detection technology used in this product is reliable and built to perform. The easy to follow instructions make this Stud Detector ready to be professionally operated from the moment it is delivered.