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Automatically darkening glare protection cassetteProtection levels 8-12 (continuously adjustable) simply pressing a button on the outside of the welding helmet activates the grinding mode and switches the light level to protection level 2.5, which offers around 400% improved visibilityOpening delay of 0.15 s - 1.0 s ( infinitely adjustable)LED indication of empty batteries and activated grinding modeBattery life approx. 3000 hVersion: Battery life approx. 3000 hStandard: DIN 8-12Field of view: 90 x 110 mmColour: black