Features: 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. Easy Operation: This detector is very convenient to use. It has LED LCD green backlight screen and can see clearly in the dark. It sense-changes in the density of the space behind the wall and very accurately locates the center of the column. Effortlessly pinpoint hiddens metal objects, including metal detector gold silver, within walls, floors, and ceilings thanks to its advanced sensor technology. Precise and Rapid: The wall stud finder adopts an intelligent micro-sensor chip with the highest sensitivity which can accurately and quickly find edges and center of metal, studs, joists, pipes, and live AC-wire behind walls, floors, and ceilings. Fast detection saves users time and effort, making tasks completion easier. It must be ultimates present for professionals, homeowner,s and DIY enthusiasts 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 objects. Notice: *Actual color may be slightly different from the image due to different light effect *Please allow 1-3cm deviation due to manual measurement Description: Display: LED LCD with green backlight Material: ABS/TPE Size: 176 x 72 x 37 mm Battery: 1 x 9V dry cell