With a fast light-to-dark response time, this Electronic Welding helmet is the ideal solution for protecting your eyes The SIP Meteor 2300 Electronic Headshield boasts a fast light-to-dark response time, effectively protecting eyes from sudden arcs, powered via solar panel and Lithium CR2450 3V batteries. Features:   Adjustable weld/cut/grind mode settings: 9-13 SHADE for ARC/MIG/TIG welding, 5 - 9 SHADE for plasma cutting, 4 SHADE for grinding  1/10,000 second light-to-dark response time  Test button checks headshield functions correctly  Solar panel + 2 x CR2450 3V batteries/low power warning  Adjustable padded headband for extended comfort  Lightweight construction  Large viewing area  4 x light sensors   Uses True Colour HD LCD lens technology Specification:  Filter Size: 133mm x 114mm x 10mm  Viewing Area: 100mm x 59.5mm  Outer Protection Lens: 134mm x 114mm  Inner Protection Lens: 105mm x 66mm  Grinding Shade: Shade 4  Plasma Cutting Shade: Shade 5 - 9  ARC/MIG/TIG Shade: Shade 9 - 13  Battery/Solar: 2 x Lithium CR2450 3V  Response Time: 1/10,000 second  Delay Time: 0.1 - 0.8 seconds  Operating Temperature: -20°C to +65°C  Net Weight: 0.5kg  Packaged Dimensions: 290 x 260 x 260mm