The detector can detect metals (steel bars, copper pipes, etc.) and cables hidden in walls, ceilings and floors. Backlit screen, intuitive display, accurate detection. Soft rubber is anti-fall, simple operation. Make detection easier, safer and more time-saving. Large area sensor improves accuracy. One button, open and test, solve the problem of multiple mode buttons. The screen displays the distance data of the detected object, and the buzzing sound indicates the location of the object. Specifications: Main material: ABS Color: black Battery: 1 * 9V battery (not included) Maximum detection depth: Ferrous metal: 120mm Non-ferrous metal (copper): 100mm Alternating current (AC): 50mm Copper wire (4mm2): 40mm Automatic shutdown time: 5 minutes Operating humidity range: 0-85% RH in metal mode Operating temperature range: -10~+50 Storage temperature range: -20~+70 Use time: about 6 hours Item size: 147 * 68 * 27mm / 5.8 * 2.7 * 1.1in Package size: 184 * 101 * 55mm / 7.2 * 4.0 * 2.2in Package weight: 250g / 8.8ounce Packing List: 1 * Wall Detector 1 * Protective Bag 1 * User Manual