ADATA High Endurance microSDXC 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.