Auto darkening welding mask

Key Attributes.

Model No.:S777B (black color) Color for Choice:Black, Red, Blue, Silver,Black Carbon Fiber, Blue Carbon Fiber, Red Carbon Fiber, Eagle with Flag, Leaf, Skull with Flame, Chinese Character Arts Viewing Area: 98X55mm (3.86"X2.17"), four optical sensors Size of Cartridge: 110X90X9mm (4.33"X3.54"0.35") UV/IR Protection: Up to Shade DIN16 at all time Light State: Shade DIN 4 Variable Shade: From DIN 9 to DIN 13 Power Supply: Solar cells, with built in replaceable battery Power On/Off: Fully Automatic Sensitivity: Outside can be contiued adjustable Function:" Welding"/"Grinding" can be selective Switching Time: a) Light to Dark: 1/30000 sec (0.000033 sec) b) Dark to Light: 0.25~0.8 sec at "short-long" position Operating Temperature: -5°C to +55°C (23°F ~ 131°F) Storing Temperature: -20°C ~ +70°C (-4 °F ~ 158 °F) Helmet Material: High-impact resistant plastic/Polyamide (Nylon) Guarantee Period: 2 years Standard: In full conformity with related EN safety standards and ANSI Z87.1-2003/2010 standards. Total Weight:480 g or 450 g