The ATD Tools Auto-Darkening Welding Helmet, No. ATD-3716, automatically turns from light to dark and back to light. This helmet weighs only .96 lbs and adjustable for user comfort, has a ratcheting headgear with sweatband, a responsive lens with a switching speed up to 0.3 ms, a welding and grinding mode adjustment located on the outside of the helmet, four ARC sensors for high response. This helmet has a 3.62" by 1.61" viewing area and sensitivity and time-delay adjustments. This helmet includes two solar cell 3V lithium batteries and meets ANSI Z87.1 and CE EN 169/379 standards.