in full conformity with CE and ANSI Z87 standards; Full range UV/IR protection: Up to shade DIN16; Viewable window 40mmX90mm; Operating Temperature: -5 degrees C ~ 55 degrees C * Solar power energy with lithium battery for backup; Easy user-selectable (DIN) variable shades from 9-13; Clear state:#3; Response time is 0.00005 Seconds or 1/20,000 seconds; * Power Turns on and off automatically; Adjustable ratcheting headband; sensitive knob for you to adjust the sensitivity of helmet * Filter dimension: 110*90*8.5 mm; View size:98*44 mm; Light state shade: DIN4; Dark state shade: DIN9-13 Outside adjustable; * Switching time: 1/30000S; Delay time: 0.2-1.0S fast-middle-slow can be selected; Sensitivity control: Low or high can be selected; Power supply: solar cells,no battery change required; Power on/off: Full automatic