� Professional Auto-Darkening Welding Helmet is designed to meet the needs of the professional user � The helmet offers the latest safety features while providing maximum performance and comfort � Lightweight & adjustable for complete comfort � Ratcheting headgear with sweatband � Automatically turns from light to dark and dark to light � Responsive lens switching speed up to 0.3ms � Welding & grinding mode adjustment conveniently located on outside of helmet � Sensitivity and time delay adjustments � (4) ARC sensors for high response � Includes (2) solar cell 3V lithium batteries � Large 3.62� x 1.61� viewing area � Meets ANSI Z87.1 and CE EN169/379 standards � Replaces ATD-3718