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Experience the difference The anti-glare cassette of the optrel e684 proves the highest standard 1 in all 4 classifications for assessing image quality. The extremely good viewing angle dependency in particular demonstrates the quality of the optrel anti-glare cassette and makes working with the optrel e684 so pleasant. The adaptive shade level adjustment puts on the optimum shade level fully automatically in between the range of 5 to 13. This is done by an additional brightness sensor, measuring the intensity of the welding arc. You are always perfectly protected, whatever welding parameters you are using. Manual adjustment isn’t necessary, but sure also possible at the tip of your finger. A specially developed UV/IR filter enables the realistic color perception typical of optrel and brings the colors into the world of welding.