The specification of the auto darkening welding helmet

Light State: Din4 or 5Dark States: Din9-13 ( Stepless Adjustment) Switching Time: <1ms at room temperatureDelay Time: slow: 0.6s0.8s fast: 0.1s0.3sBatteries: Two AAA alkaline batteries(Min. lifetime is 1000 welding hours)Operating Temperature: -5oC -- +55oCViewing Area: 90 x 40mm (3-1/2" x 1-2/3")Size of Filter Cartridge: 110x 90 x 8mm Rate of Ultra-Violet transmittance: 210<λ<313nm<0.0002%313<λ<365nm<0.0002%Rate of Infra-Red transmittance: 780-1300nm<0.027%1300-2000nm<0.094%Weight: 520g (1.15 Pound)Material of mask: Nylon