Designed with an auto-darkening feature that ranges from DIN 9-13, the Lincoln welding helmet adjusts to the activity and environment for enhanced eye safety. This welding mask has a large viewing area of 3 3/4 inches by 2 inches (9.6 cm x 5.1 cm), improved optical clarity, and four arc sensors for greater sensitivity. Additional features include a grind mode and test button. Comes in a dark blue colour. Replaceable battery included.