1Automatic darkening helmet has wider coverage than common helmet. 2It can be used to protect the face and neck against damage from electricity arc and improve working efficiency. 3This product is widely used in shipbuilding, petroleum, architecture, steel, boiler manufacture and so on. 4The helmet can transfer the electricity arc resulted from welding to electronic signals. These signals will be magnified and passed to the LCD driven circuit, in which the light valve will be turned from light to dark. 5It can effectively block the ultraviolet radiation and infrared ray, and effectively protect workers' eyes against the damage from ultraviolet radiation and infrared ray.