Light weight design has a 5 way adjustable headgear and padded interior for comfortable use. Extra large viewing area with true color technology. Four independent arc sensors with adjustable sensitivity and delay controls. Lens darkening reaction 1/10,000 second. External knob dark shade adjusts from #4-8 to #8-12. Solar powered with lithium battery backup.

Main Window: Light state: DIN3; Dark state: DIN 4-8/8-12 Viewing area: 4.53” x 3.35” Side Window: Light state: DIN3; Dark state: DIN 10 Viewing area: 2(pcs)x3.15(Top)” /1.38(Bottom) x 2.68(Height)”) Switching time: <1/10,000S at Room Temperature Sensitivity: Stepless Adjustment, Outside helmet Delay time: Stepless Adjustment Outside helmet 0.15S ~0.8S Shade Adjustment: Outside & Stepless Sensors: 4; Optical class: 1/1/1/2; TIG Capability: >2A Grinding: Outside switch; Power Supply: Replaceable Li-Mn & Solar Combination UV & IR protection: Up to shade 16 Certification: CE ANSI; Weight: 1.35 Pounds; Material of helmet: NYLON