·auto darken welding helmet details as below:

Type:                X-501
·Cartridge Size:        110 ×90 ×5 mm
·Viewing Window:        88 ×34 mm
·Switch Time:              ≤0.5ms
·Shade:                    3 / 11
·Ultraviolet Protection: < 0.0001%(210-365nm)
·Infrared Protection:    < 0.0001%(780–2000nm)
·Power:    Solar Cell with Lithium Battery (no power switch)
·Weight:                     400g