Memory Card micro SDXC, 64GB, read speed up to 170MB/s, write speed up to 90MB/s, UHS-I, U1, U3, A2 The SanDisk memory card is a secure and very small device for the storage of data. The type of card is micro SDXC. This small format means it'll fit into mobile phones and other smaller electronics. It has a capacity of 64 GB. It downloads data at a speed of 90 MB/s, and downloading from it is at a speed of 170 MB/s. Thanks to its specifications, it is suitable for extremely demanding work like saving 4K video. The packaging includes a very handy SD adaptor. SanDisk MicroSDXC 64GB Extreme Pro A2 UHS-I (V30) U3 + SD Adapter Memory Card Key Features micro SDXC card type Interface: UHS-I, U1 and U3 Total memory card capacity: 64 GB Top reading speed: 170 MB/s Writing speed: 90 MB/s Perfect for recording 4K videos SD adaptor included in packaging Applications performance class: A2