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 x 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. Specifications: Name: Wall Detector Material: plastics Battery: 1 x 3V, 390mAh battery (included) Item size: 139 x 63 x 25mm / 5.47 x 2.48 x 0.98in Item weight: 200g / 7.05ounce Package size: 183 x 103 x 53mm / 7.20 x 4.06 x 2.09in Package weight: 240g / 8.47ounce Package List: 1 x Wall Detector 1 x USB Cable 1 x Carrying Bag 1 x Guideline Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia