This Shade 11 welding safety helmet has a fast fully-automatic darkening reaction on striking the arc to protect the eyes. Suitable for ARC, MIG and TIG welding. The 90 x 34mm viewing area provides good visibility of the weld zone. The helmet provides UV and IR radiation protection at all times, even without power. It is powered by a Li-ion battery and solar panel technology, which works with the battery to provide longer life energy conservation. It has an adjustable headband for an optimal fit and comfort during use.