ADATA High Endurance microSDXC/SDHC UHS-I cards are high endurance, Video Speed Class 30 (V30) memory cards that are specifically designed for continuous recording and constant re-recording. They are ideal for dashcams and surveillance systems, and any other application that requires stamina for non-stop recording. What's more, with an Application Performance Class 2 (A2) rating, they can provide users with a faster, smoother app experience. Plus, they can handle extreme environments with their waterproof, shockproof, and X-ray-resistant constructions. Built with high-quality NAND Flash chips, High Endurance microSDXC/SDHC UHS-I cards are made to withstand up to 80,000 hours of high-definition video recording. Whether a fender bender on your dashcam, incident on your CCTV system, or home video on your camcorder, you can be at ease that all will be captured. With error correcting code technology, these cards can detect and fix a wider range of data errors. Plus, they are also waterproof, shockproof, X-ray-proof, static-proof, and resistant to extreme temperatures. These UHS-I U3-compliant V30 Video Speed Class cards provide read/write speeds of up to 100/80MB per second, making 4K, 8K, 3D, or 360° video recording a snap. Whether watching videos or playing games, these Application Performance Class 2 (A2)4 cards run and launch mobile apps faster for a smoother experience.