1,solar welding mask 2,Dark state: DIN9-13 ( Stepless Adjustment outside ) 3,Switching time: < 1/10,000s at room temperature. solar welding mask1 ... /High6,Battery: Li-Mi & Solar Combination7,(Min. Lifetime: 5,000 Welding Hours)8,Operation temperature:-5°C(23°F)-+55°C ... ≤0.009%13,Weight: 430G (0.95 Pound)14,Material of helmet: PP15,Available color: blue/ black/ silver solar welding mask -silver color