* Light shade No: DIN4

* Dark shade No: DIN9-13(Stepless adjustment)

*Size of filter cartridge: 110mm x 90mm x 9 mm (4-1/3” x 3-5/9” x 4/11”)

*Viewing area: 92 x 42 mm (3-6/7” X 1-2/3”)

* Power: solar Power& Lithium Battery

*Min lifetime: 5000 welding hour

*Switch time: <1/10,000s at room temperature

*Delay time: Stepless adjustable fast/slow 0.5s-0.7s

*Sensitivity:  low and high

*Operating temperature:-5 degree(23 F) -+55 degree(131 F)

*UV transmittance:313nm<=0.00006% 365nm<=0.00006%

*IR   transmittance:780nm-1300nm<=0.003% 1300nm-2000nm<=0.009% 

*Weight: 430g (0.94lb)

*Material of helmet: nylon

*Available color: blue,black,silver