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. Fine quality liquid crystal optical coating protects welding operator from harmful rays such as ultraviolets rays and infrared rays, etc (level of protection: 16#). The design of automatic form 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. of anti-interference switch avoids not seeing welding object clearly due to complicated surrounding nearby. Dark shade DIN5-DIN9/DIN9-DIN13, stepless control, set by hand according to actual situation. Dark to light: 0.1s-1.0s, stepless control, and can be used for cutting, grinding protection. The goggles can be worn separately, and the buckle design is easy to remove. Active viewing area: 122.5 x 35mm / 4.8 x 1.4in Light shade: DIN4 Dark shade: DIN5~DIN9 / DIN9~DIN13 Way to shift dark state: outer, stepless shift Switching time: less than equal 3/10000s Sensitivity adjustment: stepless control Delay time: 0.1s~1.0s Power supply: 1 * CR2450 button battery, 3V, 550mAh (included) Operating temperature: -5~+55 Sensors to weld arc: 2 Protect grade against UVB: DIN16 Grind: YES Cut: YES Low battery: YES Test: no Working principle: Different with traditional passive shading lens, traditional passive shading lenses are made of additives and pigment. ADF adopts LCD as lens, using the probe on mirror to probe the appearance and disappearance of arc when welding, and using the electricity to drive shading lev