The CPL filter is used for VIOFO A229/A139/A139Pro/WM1/T130 Dash 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 year