Fast read-write speeds: It comes with up to 80MB/S Read and 90MB/S Write Speeds. Works perfectly in environments ranging from 13°F (-25°C) ~ 185°F (85°C). Using unqualified SD or third party cards can affect dashcam's performance and in some cases, force the dashcam to reboot randomly during recording. The reason is that dashcams put SD cards under higher stress than most electronic products such as action cameras or DSLRs due to their constant loop recording. We cannot guarantee the perfect performance of cards from other manufacturers, as even cards with same specifications may vary from batch to batch. We recommend using AZDOME SD cards for optimal performance. This third party SD card may not be able to meet the normal working requirements of our 3-channel dash cam. Perfect Compatibility for all dash cam: We test our cards extensively before selecting them for inclusion in dash cam, to make sure that their performance is good and degrades as little as possible over time.