This is a 4 in 1 electronic stud sensor, made of high-quality materials and advanced technology, with excellent functionality and long-term durability, and can serve you for a long time. It can detect studs, metals, AC wires, etc. in the wall, which brings great convenience to your home improvement work. Features - Material: ABS, electronics.- Size: About 18.00X8.00X3.50cm/7.07X3.14X1.38inch.- Battery:1 9V dry battery (not included).- It is made of high-quality and durable materials and will not be easily damaged.- Compact handheld body and anti-slip design, convenient to use.- This practical wall scanner can detect metal, studs AC wire inside the wall.- It has a high-quality internal sensor that can accurately locate the center of the stud.- When the substance is found, the LCD display will indicate the direction.Packing list: 1 x Stud Finder1 x Manual1 x Packing Box