Integral Premium High Speed SDHC and SDXC cards are a perfect fit for your DSLR, digital camera, camcorder and SD compatible PC. These cards offer super-fast read and write speeds and are ideal for 4K Ultra High-Definition video, large RAW photos and burst-mode photography. Benefits: Ideal for use in compatible devices including DSLR, compact digital cameras, bridge cameras, camcorders and SD compatible laptops Fast read and write ensures smooth video capture even when shooting at 4K and Full HD. No lag or dropped frames Ultra-fast read / write, with up to 100 MB/s read and 50 MB/s write (64GB) Ultra-fast read / write, with up to 100 MB/s read and 50 MB/s write (128GB) Ultra-fast read / write, with up to 100 MB/s read and 50 MB/s write (256GB) Ultra-fast read / write, with up to 100 MB/s read and 50 MB/s write (512GB) Features: Video Speed Class 30 (V30) UHS-I, Class 3 specification Complete with free protective case 5 year warranty Based on internal testing; performance may vary depending on host device.