Durable Fire Retardant Material; High Definition Protective Filter; View Welding Conditions Clearly When Welding; Activated The Moment You Start Work; This Products Adopts Advanced Circuit Design; When Striking The Arc; The Observing Window Darkens Immediately; Permanent Uv/ Ir Protection ;Fashionable Appearance; Ultra Light Design; Ergonomic Design; High Performance Solar Cells And Lithium Battery; Sensitivity And Delay Time Can Be Adjustable; Grinding And Welding Mode Can Be Selected; Ultra Low Power Consumption; Self Checking Function;Low Battery Display.