TRUE COLOR VIEW; OPTICAL CLASS: 1/1/1/1; FILTER SIZE: 114*133*10MM, VIEW SIZE: 100*60MM; LIGHT SHADE NUMBER: DIN4; DARK SHADE: TWO RANGES - DIN5-9 AND DIN9-13; SWITCHING TIME FROM LIGHT TO DARK: 1/25000S; SWITCHING TIME FROM DARK TO LIGHT: 0.2 - 1.0S; POWER SUPPLY: SOLAR CELLS + CR2450; UV/IR PROTECTION: DIN16; SENSORS: 4; INTERNAL KNOBS; SENSITIVITY CONTROL: STEPLESS ADJUSTMENT; DELAY: STEPLESS ADJUSTMENT; GRINDING: YES; ADF SELF-CHECK: YES; LOW BATTERY INDICATOR; 4 POINT HEADGEAR; PA6 SHELL