This auto darkening welding helmet is solar powered and works without batteries. It avoids welding spatters. The extreme temperatures won’t affect the welders, in summer it won’t be hot and the mist in the lenses won’t appear in winter when welding. Thus, this helmet is suitable for high operating temperatures. This welding helmet has a sun protective lens, so it can be used for a long time and the energy power is ecological and economical. The headband strap is adjustable and provides a comfortable and non-slip fitting, meanwhile wearers have both hands free to carry out their work.