【5 in 1 Design】This stud finder sensor has 5 in 1 design, which can provide more detection needs. It quickly and easily locates wooden metal studs, joists, metal pipe rebar and live AC wires behind walls, floors and ceilings..【Audio Alarm Design】This detector can detect the exact position of the object. When an object is found, it will sound an alarm. It performs a quick test, saving you time and energy..【Easy Operation】This detector is very convenient to use. It has LED LCD green backlight screen and can see clearly in the dark. It senses changes in the density of the space behind the wall and very accurately locates the center of the column..【Comfortable Non-slip Handle】Our stud finder is super easy to use both for laymen and professionals. The ergonomic design of this electronic stud sensor makes it comfortable to hold from any angle..【Wide Application】This SH402 wall detector can clearly identify what objects are inside the wall, very accurate. It is suitable for wood detection, metal detection, current detection and more. Use it whenever you want to see inside an opaque object.