Product Description: WS-120 is a handhold wall scanner for quick detection of magnetic metals in wall, rooftop and floor, such as reinforcing steels, iron pipes, and nonmagnetic metals such as aluminum pipes, copper pipes, and nonmetal materials such as beams, PVC water pipes, as well as electrified objects as live wires. Features: Perfect for detecting metal, wood and AC cable hidden in the wall. Indicates the detecting results by Light and Beep material: plastic Color as shown Detect AC cable with voltage higher than 110V, 50-60Hz, the sensibility may be weak when the cable is grounded. High accuracy, with a maximum detection depth of 110mm. Specifications: Detect Ferrous metal and Non-ferrous metal AC live wires, wood Maximum scanning depth: 110mm Ferrous metals: 110mm Non-ferrous metals (copper pipe): 110mm Copper conductors (live): 50mm Wood & PVC Tube : 25mm Automatic switch-off after approx: 5min Operating Condition : Temperature: -10 to 50℃ Humidity: Less than 75% Altitude: Less than 2000M Storage temperature: -20℃ to 70℃ General Information: Battery type: 3 x 1.5V, AAA alkaline (not included) Dimensions: 185 x 85 x 33mm Weight: 180g Package Contents: 1 x Wall Detector 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.