... . Electro-optical technology of Germany . 3.CE,ANSI Z87.1. 4.Variable shade: from DIN 9 to ... DIN 13. Detailed Production DescriptionAuto-darkening Welding Mask CE (EH-220/EF9848)1.Model:EH-220/EF9848, Configuration ADF ... , two lithium batteries be changed.10. Switching time(welding mask ce):a) Light to dark: 1/25,000s.b) Dark to ...