Hyundai 256GB 4K MICRO SDXC LIFETIME. Capacity: 256 GB, Flash card type: MicroSDXC, Flash memory class: Class 10, Internal memory type: UHS-I, Read speed: 95 MB/s, Write speed: 85 MB/s, UHS Speed Class: Class 3 (U3), Video Speed Class: V30. Protection features: Magnet proof,Shock resistant,Temperature proof,Water resistant,X-ray proof, Product color: Blue,White