microSDHC Class 10 UHS-I 300x (Premium) Designed to enhance your smartphone and tablet user experience, Transcend microSDHC UHS-I memory cards feature the Ultra High Speed Class 1 specification. Utilizing this next-generation technology, these cards ensure the best possible performance when running memory-intensive mobile apps and games, as well as smooth Full HD video recording and seamless playback. - Supports Ultra High Speed Class 1 specification (U1) - Smooth Full HD video recording performance - Ideal upgrade for smartphones, tablets, and digital cameras - Class 10 compliant - Built-in Error Correcting Code (ECC) to detect and correct transfer errors - Exclusive RecoveRx photo recovery software