This instrument can detect metals (rebars, copper pipes) in walls, ceilings and floors, live wires, Rib and Slot position under wooden walls, etc. With the 2.4inch display screen 240*320 resolution and also with the backlight, you can see the data more clearly even in the weak light environment. 3 detection modes design, metal detection mode, wooden wall detection mode, and live(AC) wire detection mode to meet your different working demands. It is widely used in interior decoration, home installation and other industries, allowing various construction safely proceed. Features: Selected engineering plastics body, shock-resistant and anti-drop, wear resistant and can provide long service time. Adopts high sensitivity sensor, the central target positioning ensures high detection accuracy. With the 2.4inch display screen 240*320 resolution and also with the backlight, you can see the data more clearly even in the weak light environment. 3 detection modes design, metal detection mode, wooden wall detection mode, and live(AC) wire detection mode to meet your different working demands. Metal detection mode: it has the functions of metal positioning, depth indication, and metal attribute identification. Mainly used to detect steel bars, metal keels, metal pipes, etc. in walls. Wooden wall detection mode: Mainly used to detect gypsum boaro wooden beams in wooden partition walls, wooden beams/plastics pipes/ hollows in cement walls, detect the uniformity of the wooden wall, identifying bone positions and slots, and etc. Live(AC) wire detection mode:Mainly used to detect live (AC) wires in the wall. Different material have different detection depth, wood 38mm, non-magnets metal 100mm, live wire 50mm, magnets metal 120mm. Equipped with voice broadcast function, , can broadcast the measurement results in real time, you can get a nice using experience. Wide applications, it can be widely used in interior decoration, home installation and other industries. Specifications: Name: Wall Detector Material: plastics Battery: 1 * 3V, 390mAh battery (included) Item size: 139 * 63 * 25mm / 5.47 * 2.48 * 0.98in Item weight: 200g / 7.05ounce Package size: 183 * 103 * 53mm / 7.20 * 4.06 * 2.09in Package weight: 240g / 8.47ounce Package List: 1 * Wall Detector 1 * USB Cable 1 * Carrying Bag 1 * Guideline