Fine quality liquid crystal optical coating protects welding operator from harmful rays such as ultraviolets rays and infrared rays, etc (level of protection: 16#). of anti-interference switch avoids not seeing welding object clearly due to complicated surrounding nearby. The design of automatic transform technology is uesd of controlling circuit, which makes it possible for goggles to be to react to the arcin 3/10000 second and change strong light to dark light. As a result, it can protect our eyes from being injured by sudden arc. The safe structure design adopts a world famous style and conforms to the ergonomic principle, has sufficient internal space, which makes it easy to operate and comfortable to wear. The soft helmet housing material is to high and low temperatures, resistance, flame-retardant and light-proof with high strength. Dark shade DIN5-DIN9/DIN9-DIN13, stepless control, set by hand according to actual situation., Weight: 0.54233716452 Pounds, Manufacturer: melairo