[Filter modal:WH310] Light state: Din4 Dark state: Din9-13 ( Stepless Adjustment) Switching time: < 1/10,000s at room temperature Delay time: slow/ fast 0.15s~0.80s Battery: Replaceable AAA & solar combination (min. Lifetime: 5000 Welding Hours) Viewing area: 90 x 40 mm (3-5/9" x 1-3/5") Cartridge Size : 120 x 95x 10 mm (4-8/11" x 3-8/11" x 2/5") Weight: 680G (1 .50 Pound) Material of helmet: NYLON Available color: blue/ black/ silver [Optional Filters:WH310/WH320]