About this item The CPL filter is compatible with A119M Pro, A119MINI2, A129 Pro Duo, A129 Plus Duo, and A119 V3 dash cameras, suitable for both front and rear lenses of A129 Duo. Protect the lens from fingerprints, scratches, and dirt. Reduce reflections and glare from glass, metals, or shiny surfaces, enhancing image quality, similar to polarized sunglasses. Make colors more saturated. Dimensions: 1.97 x 1.57 x 0.04 inches.