The 256GB SanDisk Extreme microSD card offers a read speed of 190MB/s and a write speed of 130MB/s, making it ideal for 4K video recording. - Brand: SanDisk - Model: Extreme - Capacity: 256GB - Speed: 190MB/s (Read), 130MB/s (Write) - Class: UHS-I U3, V30, A2 Thank you for viewing.