Item Type: Auto Darkening Filter Model: TX510EF Frame Size: Approx. 109 x 89 x 9mm / 4.29 x 3.5 x 0.35in Window Size: Approx. 92.5 x 42.5mm / 3.64 x 1.67in Bright Color Number Grade: DIN4 Dark Color Number Grade: DIN4/5-13 Dimming Response Time: 1/10000S Sensitivity Adjustment: Stepless Adjustable Recovery Time: 0.1s~0.8s Power Supply: 2 x lithium battery CR2032 with 300mAh capacity, shipped with built in battery. Protection Grade of Infrared Ultraviolet Ray: DIN16 Arc Sensors: 4pcs1A Larger Viewing: The welding lens has a large field of vision, which can provide a clear and larger angle of view and reduce eye fatigue. 2High Sensitivity: The solar automatic dimming welding lens adopts 4pcs sensitive arc sensor for more stable and reliable performance. 3Faster Responses: The welding lens has quick response time within seconds, which can provide better protection for welders. 4Great Protection: Moreover, the auto darkening filter can effectively filter out infrared ray and UV ray to better protecting you. 5Easy to Install: Designed to have a compact size and a light weight as well, the convenient installation can be quickly finished. 1 xAuto Darkening Filter