Integral Premium High Speed microSD (microSDHC/XC) cards are the perfect partner for your high-spec smartphone or tablet. Enjoy more space for photos, videos, music and apps. These superior cards offer super-fast read and write speeds and you can record 4K Ultra High-Definition video and take burst mode photos with confidence. FEATURES Ideal for use in compatible smartphones, tablets, digital cameras, actions cams, drones and game consoles Fast read and write ensures smooth video capture even when shooting at 4K and Full HD. No lag or dropped frames Video Speed Class 30 (V30) A1 App Performance Specification - high IOPS ensures best performance in compatible smartphones and tablets UHS-I, U3 specification Ultra-fast read / write, with up to 100 MB/s* read and 90MB/s* write (128GB, 256GB), 80MBs* write (512GB), 70MBs* write (32GB, 64GB) SD Adapter included 5 year warranty *Based on internal testing; performance may be lower depending on host device.