HART PROFESSIONAL STUD FINDER stud detector. This device is simply indispensable for those who are engaged in repair, construction or simply likes to master. With its help you can quickly and easily find the frame studs, whether wooden or metal. And no pre-calibration is required - just turn it on and start searching! LED indication allows you to simultaneously display the center and edges of the detected post. At the heart of the device are 9 highly sensitive sensors that provide a maximum detection depth of up to 1.5 inches. Such characteristics allow you to find posts even behind thick layers of finishing materials. Despite its high functionality, the detector is very easy to use. It requires only 2 AAA batteries for its operation.