AUDEW Solar Welding Helmet Auto Darkening ARC TIG MIG Weld Welder Lens Grinding Mask Catridge Size: 96 x 48 x 6 mm , View Area: 93 x 43 mm. Response time(bright to dark): &lt;1/30000 seconds (normal temperature conditions). Sensitivity(welding based on current size): adjustable: low/high. Battery: lithium battery + solar cells. Uv protection: 16 levels.