Delay the for to adjust the for time from black to light after welding The welding helmet lens has a clear window and a wide field of watching , which can quickly and reliably filter out welding light This welding lens set is easy and safe to operate , and it can be used with of welding This welding argon welding solar automatic charging , without the use of power , is practical and Using this welder group can be well protected at work to occupational diseases, Manufacturer: Watreketal