Samsung Pro, 64 GB, MicroSDXC, Class 10, UHS-I, 90 MB/s, 80 MB/s Samsung Pro. Capacity: 64 GB, Flash card type: MicroSDXC, Flash memory class: Class 10, Internal memory type: UHS-I, Read speed: 90 MB/s, Write speed: 80 MB/s. Protection features: Magnet proof, Temperature proof, Water resistant, Product color: Gray