ARKSEN Red Spider Webs Adjustable Auto Solar Darkening ARC MIG TIG Welding Helmet ANSI Viewing area: 3.62 x 1.66 in (92 x 42 mm) 0.6-1.0s From Dark To Light Switching Time By Variable Adjustment Knob UV/IR protection: DIN 16 Dark State: Variable Shades, 9 - 13 Power Supply: Solar Cell With Replacable Lithium Battery Backup (CR2032)