The SWARM A20 lightweight welding visor is a heavyweight when it comes to performance and flexibility. With its advanced auto-darkening filter (ADF), the SWARM A20's externally selectable darkening level from 9 to 13 DIN will meet the most demanding welding applications. Additional changes to the delay and sensitivity settings can be easily made using dials inside the visor. With its streamlined housing design, CE 1/1/1/2 optical clarity, and replaceable long-lasting battery, the SWARM A20 is the ideal solution for welders whose goal is to achieve ever-improving weld quality. The SWARM A20 is the ideal solution for welders whose goal is to achieve ever-improving weld quality. Application in processes: MIG/MAG. MMA Plasma cutting. The SWARM A20 lightweight welding visor is a heavyweight when it comes to performance and flexibility. With its advanced auto-darkening filter (ADF), the SWARM A20's externally selectable darkening level from 9 to 13 DIN will meet the most demanding welding applications. Additional changes to the delay and sensitivity settings can be easily made using dials inside the visor. With its streamlined housing design, CE 1/1/1/2 optical clarity, and replaceable long-lasting battery, the SWARM A20 is the ideal solution for welders whose goal is to achieve ever-improving weld quality. The SWARM A20 is the ideal solution for welders whose goal is to achieve ever-improving weld quality. Application in processes: MIG/MAG. MMA Plasma cutting. Technical data: ADF viewing area: 93 x 43 mm (3.6 x 1.7 inches) Spectral area. Shading range: DIN 9-13 (adjustable) . CE optical class: 1/1/1/2 Arc detectors: 2 Fast switching time: 0.1 ms. Fully adjustable delay and sensitivity settings . Replaceable 1 x CR2032 battery. Low battery LED . ADF test button.