512gb storage capacity uhs-i / a1 / u1 / class 10 max read speed: 100 mb/s min write speed: 10 mb/s records photos & full hd video optimized for mobile users water / shock / temp / x-ray proof sandisk memory zone app available includes sd adapter features designed with the application performance class 1 (a1) rating, the 400gb ultra uhs-i microsdxc memory card from sandisk has been optimized to give android users an improved mobile experience, delivering faster mobile app performance. The a1 spec allows the card to manage random read input-output access per second (iops) operations so it can quickly open apps and process accompanying tasks, such as audio, graphics, saved profiles, and in-app permissions. Aside from the benefits for mobile users, this card can be used for recording photos and full hd video, has a capacity of 512gb,