MAIN TECHNICAL INDEX:
l   Filter cassette size : 110×90×8.2mm ( 4.33〞×3.54〞×0.３3〞)
l   View window size : 92×42mm.（3.60〞×1.65〞）
l   UV/IR protection : Up to shand DIN 16
l   Clear state Shade No : DIN4(3 )
l   Dark state Shade No : DIN9(8)—DIN13(14)　stepless adjustment
l   Welding / grinding function: can be selective.
l   Power supply : solar cells, No battery change required
l   Power on/off :  Fully Automatic
l   Response time :
                A)  Clear to dark : ≤ 1/25000S
B)  Dark to Clear : 0.2-0.35S
l   Work temperature :  -10+60℃ (14—149℉)
l   Storing temperature : -20—+70℃ (–13—167℉)
l   Gross weight : 465 G