Electric Welding Safety Mask

Window size: 90 * 40 mm
Welding mask specification: 335 * 220 * 220 mm
Window number: bright state: DIN4
The dark states: DIN9-13 (adjustable shading, adapted to different environment conditions of operation)
The response speed: 0.04 ms (bright to dark state)
Delay time: 0.2 0.3 s (dark to bright state)
Uv transmittance: 310 nm to 365 nm < 0.000076%
Infrared transmittance: 780 nm to 2000 nm < 0.0001%
Working temperature: - 10 - c - 70 c +
Power supply: solar cells and the two 7 # (AAA) batteries
Automatic shutdown time: 15-20 minutes (in the case of no welding)
Protective way: using reflection type filter protection way
Gross weight: 515 g