... battery change required Large view 100x49mm Fixed dark shade 11 Auto-darkening Welding Helmet Order No. WH2300001 1),Filter size: 110 x ... dark: 1/25,000s 7),Delay time:0.5s 8),Solar cell,no battery change required 9), Meets EN379, EN175, ANSI ... Z94.3 Standard LARGE VIEW 100x49mm Fixed dark shade 11 Auto-darkening Welding Helmet