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 and 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 and 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; Product weight: .96 lbs.Instruction Manual