... *View area 96x42mm *Power by Solar cell.No battery change required Solar Welding Mask-CE Marked1),Filter size: 110 x 90mm2),Viewing area ... time: 0.1-0.9s stepless adjustable.8),Power source: Solar cell with Lithium cells9),Replaceable Inner and Outer protective lens ... : -5degree~+55degree14),Shell material:PA15),Weight:495g16),1 year guarantee17),CE approved.