... ergonomic structure comfortable and convenient to use.3. Argon arc welding adaptability:Common type(>30A)4.Ample mask space, safety ... structure, excellent face protection from welding.5. Use high quality LCD and multiplayer optical interference filter ... 15.6. Power supply by solar cells,no battery change required.7. Fit for standard auto darkening filter dimension:110*90*8mm(4 ...