- Shade number in light state: Din4#
- Shade number in dark state: Din9-13# (stepless regulation)
- Response time: <0.1ms (room temperature)
- Return Time: rapid-0.5s slow-1.5s
- Power supply: Two AAA alkaline batteries (not included) & solar cell (min welding hours: 1000)
- Working temperature: 23°F to 131°F
- View area: 3.54" x 1.57"
- Material of helmet: Nylon
- Design on Helmet may vary
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