Premier Pro microSDHC memory cards are the industry’s fastest, implementing the latest SDA 3.0 specification, Ultra High Speed 1 (UHS-I). They are especially suitable for users of smartphones and tablet computers. In multi-tasking operation, the read/write speeds reach 45/40 MB/second, with number of operations reaching 1400/150 (operations per second). This means that running several applications at the same time will not impede the device performance.nnPremier Pro microSDHC UHS-I U1 V.S. microSDHC Class 10 Efficiency Comparison.nPremier Pro microSDHC UHS-I U1 32GB capacity memory cards have read/write speeds up to 45/40 MB / sec, as compared to microSDHC Class 10 cards with read/write speeds of 20/16MB/sec, the performance is more than doubled.nnMultitasking Performance.nPremier Pro microSDHC UHS-I U1 in 32GB capacity has random write speeds up to 191 IOPs and random read speed upt to 1450 IOPs. Compared to general multi-purpose smart phone SD 2.0 memory cards, random write speeds are significantly improved by 99%. With this cost-effective competitive advantage, consumers can fully meet the needs of the latest generation of multitasking smart phones and tablet PCs.nnDurability.nThese memory cards employ Error-Correction Code (ECC), and possess extreme cold-resistance, heat-resistance, and resistance to x-rays, making them some of the world's most rugged memory cards.nnSatisfy any Capacity Requirement.nPremier Pro microSDHC UHS-I U1 memory cards come in capacities of 8, 16, and 32GB, and come with an SD adaptor for easy interface with a computer.