- Strong materials and fire retardant,can prevent resistance,anti-aging. - 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 designing ,wearing comfortable. - High performance solar cells and lithium battery. - Sensitivity and delay time can be adjustable. - Grinding and welding mode can be chosen. Specification Viewing Area: 9.3*4.2cm Clear state Shade NO: DIN4 Dark State Shade NO: DIN9-DIN13 stepless adjustment Response time:A) Clear to dark: around 1/10000S; B) Dark to Clear: 0.1S~0.8S Power on/off: Fully Automatic Power Supply: Solar cells.NO battery change required Sensitivity Control: Adjustable Operating Tep.: -10C~+65C Storing Tep.: -20C~+70C Grinding Setting mode: Yes Fully Adjustable Head Gear: Yes Material: PA/PP Low-voltage alarm function: Yes Package include: 1 x Welding Helmet 1 x Adjustable Headband 3 x Lens