The WS120 is a handheld tool dedicated to quickly and efficiently find studs, detect metal and alert you of live ac wiring. The ws120 comes equipped with 3 scanning modes: auto scan, metal scan and live ac wire scan. WOEKS ON A OF MATERIALS: Materials Incldue Drywall, Wood Flooring, Subflooring, Gypsum Drywall, Over Plywood Sheating. WS120 Digital Multi-scanner With modes for wood, metal, and live wiring and can quickly and easily locates wood metal studs joists metal pipe rebar and live ac wire behind walls, floors and ceilings. AUTO SCANNING MODES UP TO 100MM DEPTH: Auto scanning modes can measure metals, pvc water pipes and ac live conductors under drywall. 1. With auto mode, metal will be detected prior to other materials, if it displays "AC live" or "metals", please switch to live con or metal mode. 2. Pvc pipe or wood can be detected under auto mode, and the lcd displays "non-ferrous metals" during detection. WIRE WARNNING INDICATOR, NO FEAR OF DRILLING INTO LIVE WIRES Wire warning detection is up to 2 in.(50mm) deep. Whether you are a professional, homeowner or a diy enthusiast, you can find great use with it. WS120 Wall scanner Technical Data: Maximum scanning depth Ferrous metal: 100 mm Non-ferrous metals (Copper): 80 mm Live AC conductors ( 110, 60Hz-220V, 50Hz ): 50 mm PVC pipes: 35 mm Wood: 25 mm Battery type: 3 x 1.5V, AAA alkaline (not included in the packing) Notes: Based on measurements on drywall and depending on operating mode, material and size of the objects, as well as material and condition of the base material. Less scanning depth for wires/conductors that are not "live" The PVC water pipe should be filled with water, and the diameter should be larger than 15mm. Material: plastic colour: Black Package Contents: 1 x Metal Detector Wall Scanner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.