1This wall detector is very helpful when you are doing wall ornaments(like install some wall mounted furniture or hang some paints). 2Can quickly detect the center position of the wood stud and metal stud. 3It can avoid unnecessary losses when you want to dig a hole to hang a picture or install shelves and so on by locating metal pipes, live wire,stud and wooden frames accurately. 4Supports LED indicating light, detection AC alarm, automatic calibration and quickly detect the center of the stud. 5Quickly locates edges and center of metal studs, pipes, rebars, joists behind wall, floors and ceilings, also indicates the presence of live wire.Features:1. This wall detector is very helpful when you are doing wall ornaments(like install some wall mounted furniture or hang some paints).2. Can quickly detect the center position of the wood stud and metal stud.3. It can avoid unnecessary losses when you want to dig a hole to hang a picture or install shelves and so on by locating metal pipes, live wire,stud and wooden frames accurately.4. Supports LED indicating light, detection AC alarm, automatic calibration and quickly detect the center of the stud.5. Quickly locates edges and center of metal studs, pipes, rebars, joists behind wall, floors and ceilings, also indicates the presence of live wire.Specification:Condition: 100 percent Brand NewItem Type: Wall DetectorMaterial: ABSProductWall DetectorMeasuring Metal Stud Range0-5cm or 2inMeasuring Wood Stud Range0-3cm or 1.2inWater Pipe RangeTest 0-2cm or 0.8inLED Light