Lightweight Helmet with Grind Facility. Automatic light adjustment from Light to Dark in 1/25,000th second. Shade Control from DIN 9-13. Adjustable Sensitivity. Full Face Coverage , Automatic on / off, Utilizes High Performance Solar Cells, UV/IR Protection up to Shade DIN 16, Lifetime Expectancy of 6 years, Conforms to BS EN 379:1994 and BS EN 175:1997, 1 Year Warranty.