Filter size: 120ÃÂÂÂ95ÃÂÂÂ12mm Viewing Area: 90ÃÂÂÂ40mm Light state: DIN.4 Dark state: DIN.9-13 Switch time: 1/10000s Delay time: 0.6s Power supply: Solar cells & 2 ÃÂÂÂ AAA batteries Power on/off: Manual on, automatic off Arc sensor: 2 pieces Welding helmet weight: 430g