Optical rating：1/1/1/1<br>The Biggest View Area：100 x 67 mm<br>Sensors：4<br>Light State：DIN 3 – Dark State： DIN 5-9 / 9-13 UV/lR<br>Protection： Up to DlN 16 Switch time (light to dark)&lt;0.04ms<br>Shade control：Inside &amp; Stepless<br>Sensitivity Control：Inside &amp; Stepless<br>Delay control (dark to light)：Inside &amp; Stepless, 0.15-0.80s<br>TlG amps rated：≥2 amps<br>Grind mode：Yes,<br>Inside Material of helmet: Nylon<br>Weight：560g±5%<br>Operating Temperature： -5℃ (23°F)- +55℃ (131°F)<br>Storing Temperature： -20℃ (-4°F)- +70℃ (158°F)<br>Power Supply: Solar Panel &amp; Replaceable Lithium batteries 2pcs*CR2032<br>