Feature●The CPL filter is used for VIOFO A229/A139/A139Pro/WM1/T130 Dash Cam. (Its designed for the front cam, not for the rear cam or the interior cam.)●Protect camera lens from finger prints, scratches and dirt destroying.●Reduce reflections and glareReduce reflections and glare from glass, metals or shiny surfaces that would damage image quality, this works in the same way as polarized sunglasses.●Make colors more saturated●It can be used during day time and at night. Warranty: One yearDescription