... , 3-in-1 Stud/Voltage / Metal Detector with Easy-to-Read LCD Screen Accurately locates hidden metal pipes, live wires, stud and wooden ... frames Easy to read LCD screen Detects metal up to 70mm depth Detects voltage up to 60mm depth ... by one piece of 9V battery (battery not included) Stud detector, Voltage detector, Metal detector, 3 in 1 finder