Basic Info.

Product Description

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