Description: Widely Used - It fits all standard welding helmet window opening. Shade Automatically - It can shade automatically in welding states and filter out the bad light. Good Experience - You will have a good experience with it at working and prevent occupational disease. High Clear View - High clear view filter Use high standard of LCD and multilayer optical interference filter. Perfect Gift - The Solar Auto Darkening Welding Lens Filter with solar charge function and full automatic ON/OFF. Light states: DIN3 Dark states: DIN11 View area: 90 x 30mm Power supply : Solar cells Package including: 2pcs Auto Darkening Filter Lens