Auto-darkening welding helmet main technical indicators are: LCD part of the optical performance of the lens reaction time dark state under Color adjustment range, sensitivity and delay are adjustable and adjust the way, the window size of the liquid crystal lenses, these standards are hard directly determine the grade of the product. Wei and products as an example so other details such as housing, headband materials, precision molds and product design just like the control of the manufacturers of the products. You can access the Application Center section responsible for the domestic market, the threat comprehensive understanding.