Northern Industrial Welders Variable-Shade Auto-Darkening Welding Helmet with Grind Mode Solar-powered auto-darkening lens with 2 replaceable AAA batteries Excellent lower amperage TIG responsce (5 Amps) High-level, quality LCD ensures the welding spot appears more clearly and protects your eyes from fatigue after extended use 2 independent arc sensors Variable shades 9-13 auto-darkening with sensitivity and delay adjustment