Crown Electronic argon welding 92.5x42.5 mm

What is the electronic welding automatic shading 
The soft helmet casing material is high/low temperature, corrosion-resistant, flame retardant and photoresistant, with high strength and durability. Liquid crystals with a high-quality optical coating and UV and infrared protection (protection level DIN16).
The automatic switching technology used in the control circuit allows the glasses to respond in less than 3/10,000 of a second and switch from strong to dark light.
Dark shade, stepless control, manually adjusted according to the actual situation.
From the darkness