... you start welding for added safety, and it recovers automatically when you stop welding for better power saving. Great for both home ... and commercial use!!!Designed for ARC, MIG/MAG, TIG & MMA welding, Plasma cutting, Plasma welding ... Weight: 430G (0.95 Pound)14,Material of helmet: PP15,Available color: blue/ black/ silver Solar Welding Helmet - CE