auto darkening welding helmet

Viewing Area: 98 ?40mm(3.86 " ?1.58 " ) UV/IR Protection: Up To Shade DIN 16 at all time Light State: Shade DIN 3(4) Variable Shade: From DIN 9 to DIN 13 Power Supply: Solar cells,No battery change required Power On/Off: Fully Automatic Switching Time: a.)Light to Dark: 1/20000s, b.)Dark to Light:0.25 ~ 0.35s at position 0.60 ~ 0.80s at position