Power supply- Solar cells, lithium-polymer battery, rechargeable by USB-cable
Battery life- Appr. 1,000 operating hours.
Can be recharged as often as necessary.
Shape- stability Welding mask: up to 220 °C / 428 °F
Front cover lens: up to 137 °C / 279 °F
Eye protection- Ultraviolet / Infrared Protection: maximum protection at any shade level
Operating temperature -10°C to + 70°C / 14°F to 158°F
Storage temperature -20°C to + 80°C / -4°F to 176°F