AUTOMATIC --This solar auto darkening welding helmet features anti-ultraviolet and anti-glare infrared radiation PROTECTION --The welding goggles with adjustable shade are designed to protect eyes from sparks and harmful radiation under normal welding conditions DARKENING FILTER --The auto darkening filter automatically switches from light to dark state when an arc is struck, and it returns to light state when welding stops NO BATTERY NEEDED --Solar cells, no battery change required, easy and safety to use, lightweight design APPLICATION --Widely applied, gas welding, steel welding, cutting, welding and so on. Product Description Specifications: Material: PC(Lens), ABS - Function: Solar Car Light Dimmer: 4-6 Darkness: 9-13 Variable Lighting Speed: 1/25000s Weight: 113g Package Content: 1 x Darkening Car Solar Welding Mask, 1 x Black Strap. Can be used on Gas welding, steel welding, cutting, welding and so on. Lightweight and practical automatic variable lenses with superior impact