Review on Stud Finder Wall Scanner - 4 in 1 Electric Wood Detector: LCD Display, Center Finding & Sound Warning – Black by Dhoal Shankar

Simple and reliable. Operates on a 9V battery (not included) and has a low battery indicator. Ideal for use at home on various surfaces. Follow the included instructions to get the best results. It can find wooden and metal stands, as well as electrical wires. Automatically turns off when the button on the side is not pressed. Has about 3 seconds of calibration each time you use it.