【intelligent , practical】The Auto Darkening Filter ( ADF DX-500S ) enables welders to adapt to various working environments by controlling the shade of the lens ; Sensitivity adjustments from lighting sources 【Wide field of view】large viewing screen 99 x 44mm gives you a broader view in different kinds of welding operations ; effectively to darken the surrounding light 【Fast eye protection】to protect your eyes instantly as the is switchable sensitivity and delay settings extremely ideal for all aspect of welding and grinding work , except welding cutting 【COMFORTABLE HEADBAND & WELL BALANCED DEASIGN】Adjustable headband provides a comfortable no-slip fit while leaving the users hands completely free for working 【Good for various working environments】Recommended to automotive , construction manufacturing , metal production and fabrication , maintenance , repair and ( MRO ) , mining , oil and transportation, Manufacturer: Watreketal