Optical rating: 1/1/1/2 View area: 115 x 85 mm main window 35 / 80 x 68 mm side window Sensors: 4 Light State (DIN): 3 Dark State(DIN):4-8/8-12main window 10 side windows UV / IR Protection: Up to DIN 16 Switch Time(light to dark):0.04ms(1/25.000Sec) Shade control: Outside & Stepless Sensivitity Control:Outside,Low-high; adjust by infinitely dial knob Delay control (dark to light):Outside, 0.15-0.80s by infinitely dial knob TIG amps rated:≥2 amps Grind mode:Yes, outside Material of helmet:Nylon Weight: 610 gr Operating Temperture: -5ºC(-23ºF)- +55ºC(133ºF) Storing Temperatue:-20ºC(-4ºF)- +70ºC(158ºF) Power Supply: Solar Panel & Repalceable Lithium batteries 2xCR2450