Auto-darkening welding helmet 1.High quality LCD and multilayer optical interference filter for clear view and permanent UV/IR protection to DIN 15 2.Lens powered by solar cells with no need of battery changes 3.Ample mask space and very safe structure 4.Inner shade adjustment knob 5.Suitable for high welding operation temperature 6. A kind of nice auto darkening welding helmet Model NumberX801Cartridge Size114x84x10mm (4-1/2''x3-1/3''x2/5'')Viewing Window98x43mm (3-6/7''x1-2/3'')Grind SwitchYesShadeDin4/9 - 13Headband106gUV/IR ProtectionUp to DIN15SensitivityLow/ HighSwitching Time1/10000 sDelay Time0.2 0.8 s (Auto)Lens PowerSolar Cell & Lithium Battery (no power switch)Operation Temperature- 10-65 (14 to 140)Warranty1 year limitedPacking Size320x240x250mm(12-3/5''x9-4/9''x9-5/6'')CertificateCE EN379Gross Weight520 gMask MaterialNylon