Activates instantly when arc is struckbull this headshield is also available in a range of other colours and designsbull features grinding function so user can grind without the need to take mask offbull eye protection to en379bull light shade din 4bull manually adjusts from dark shade din 9 to din13bull shade din 15 uv protectionbull for arc mig and tig weldingbull powered by a combination of lithium batteries and solar cells