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