Product DescriptionA1 standard means that the memory card will be great as a very efficient memory extension on your smartphone. The user can successfully store data, applications, photos, videos on it with a guarantee of smooth operation of the device. KEY INFORMATION Class A1: 1500 IOPS (read), 500 IOPS (write) write up to 30 MB / s reading up to 90 MB / s V30 video class microSDXC standard SD adapter included capacity: 64 GB IDEAL FOR MULTIMEDIA The A1 class (App Performance) guarantees efficient work as a memory extension for smartphones. Application data, games, smooth video recording in 4K resolution, photo and video storage these are tasks that the PRO series card can handle easily. 4K VIDEO Write speed of up to 90 MB / S allows smooth recording of recordings in high 4K resolution. The memory card can also handle large photos in RAW format.