AUDEW Adjustable Solar Auto Darkening Welding Helmet TIG MIG Weld Welder Lens Grinding Mask (Transformers pattern) 1. Dark states:DIN9-13 free adjustment(Outside Variable) 2. Sensitivity (welding based on current size):adjustable: low/high 3. Response time(bright to dark):&lt;1/30000 seconds(normal tempteratur conditions) 4. High strong materials and fire retardant,can prevent resistance,anti-aging 5. High definition protective filter,you can see the welding conditions clearly when weling the goods.Welding luminosity is soft and comfortable.