• Professional-grade auto-darkening full-face helmet with solar and battery back-up power
• User-selected variable-darkness shades from 9 to 13; light shade 4
• Automatic shield-darken reaction time 5 milliseconds; dark-to-light 0.5-1.0 second
• Combination of solar cell and battery back-up power for dark conditions; 2 AAA included
• Rugged impact-resistant ABS, ratcheting comfort-fit headband - adjust size one-handed while wearing

For all types of arc welding (not for Laser, oxy-hydrogen or overhead welding). Absorbent padded headband is removable/replaceable. 4.85" x 1.6" view window; 22 oz total weight.