FeaturesCapacity: 128GBUHS Speed Class 1Transfer speed: Up to 100MB/sWrite speed: Minimum 30MB/s SD Adapter includedThe Integral 128GB UHS-1 U3 CL10 V30 100MB/s 4K Video MicroSDXC Memory Card is a perfect fit for your smartphone and tablet. Enjoy more space for photos, videos, music and apps. 100MB/s transfer speeds allow fast data transfer and reliable photography on your compatible device.Minimum 30MB/s write speed (U3)Full HD and 4K video recordingVideo Speed Class 10 (V30)A1 App Performance Specification - high IOPS ensures best performance in compatible smartphones and tabletsUHS-I, Class 1 specificationSD Adapter included