Auto Darkening Welding Helmet Shade 11 welding helmet. Complies to BS EN 379, BS EN 175, and DIN Standards. Features automatic switching from light to dark on striking arc. Fitted with adjustable sensitivity and delay controls for switching light to dark. Solar panel power supply - no batteries required. Deluxe contoured helmet with fully adjustable headband featuring front pad for added comfort. Suitable for MIG, TIG, and arc welding. Technical Specification Grinding Function: No Nett Weight: 470g Operating Temperature: -10°C to +60°C Operating Time Light/Dark: 0.1ms Power: Solar Cells Shade Active: 11 Shade Inactive: 3 Viewing Area: 91 x 39mm 1 Year Manufacturer's Warranty