Features :- Definition protective filter: You can see the welding conditions clearly when welding the goods. Welding luminosity is soft and comfortable.- It works the moment you start work. This products adopts advanced circuit design.- Striking the arc, the observing window darkens immediately.- Permanent UV/IR protection.- Fashion appearance. Ultra light design and comfortable.- High performance solar cells and lithium battery.- Sensitivity and delay time can be adjustable.- Grinding and welding mode can be chosen.Specification :Material: PA/PPFilter Model: LY800HFilter Size: 133 x 114 x 10mmViewable Size: 100 x 93mmProduct size: 300mm*260mmLight State Levels: DIN4Dark State Levels: DIN5-9/9-13Way to shift Dark State: Outer,step-less shiftSwitching Time: ?1 / 10000SDelay Time: 0.1S-0.8SSensitivity Adjustment: Step-less controlPower Supply: Solar + Replaceable lithium batterySensors to Weld Arc: 4Protect Grade Against UVB: DIN16Working temperature: -20? - 65?Grind: YesCut: YesLow Battery: YesTest: YesPackage includes :1 x Welding Helmet1 x Adjustable Headband