Solar Automatic Variable Light Photoelectric Darkening Welding Mask Protective Helmet. Specification: Filter Size: 110×90×10mm. Viewing Area: 92×42mm. Light State: DIN.4. Dark State: DIN.9-13. Switch Time: 1/25000s. Delay Time: 0.2-0.8s adjustable. Power Supply: Solar cells & lithium batteries. Power on/off: Fully automatic. Shade Knob: Out. Arc Sensor: 2 pieces. Sensitivity: Adjustable, Grinding. Welding Helmet Weight: 420g. Suitable for ARC, TIG, MIG, Spot, Micro, Wire, AC, DC, and Plasma Welders and Plasma Cutters. Features: - In the welding process, the visibility is high and the solder joints can be clearly observed to ensure the welding quality. - Novel design, super light, durable shell. - Filter to avoid harmful ultraviolet radiation and infrared radiation generated by the arc, and damage to the eyes caused by welding strong light. Package Included: 1 x Welding Mask